serious
i guess i should have added a question if there was an OEM involved

Sarcasm?  Or serious?

I didn't research all, but believe a few (if not all) are not developed by CHPWS.  I vaguely recall discussion of some are straight clones or some are a previously "developed" RDS and slight tweaks to CHPWS "specs" or preferences (or something like that). 

I was originally planning on either SRO or 507Comp, but the with the sale pricing of the CHPWS Comp and (mostly) good reviews, I decided to give it a try.  If the dot brightness ends up bothering me, then I'll likely try the SRO on this pistol (hopefully the tolerances allow) and use the CHPWS on a .22 lr rifle or something.

please show me where he said he was using a plate...

If you're milling the slide, why not mill it for the optic that you're going to use?  I mean, adding a plate adds extra cost, stuff that can go wrong, and slight increase in bore height.

Are Trijicon SRO, RMR, etc...diff footprints? I never looked into this or Holosun's as I only have 1 RDS, so it's moot for us.

serious
i guess i should have added a question if there was an OEM involved

I vaguely recall a YT video mentioning the producer(s) of some of the CHPWS offering.  It may have been the Duty version though.

Shot the 17.5 with EPS setup this past weekend in a match.  I used the highest dot intensity.  I probably could have tried the second to highest setting, but didn't want to have to adjust mid-stage.  It was very sunny at the start of the match and stayed that way most of the day.  I don't recall having to use the highest dot intensity setting in previous range days before, including when I did the CCW quals with this particular setup.  I also checked the battery on the CHPWS Comp, maybe these dots intensity ranges are on the lower side.  I recall the guns with RMR having some brightness settings in reserve.  I think same/similar with ACRO, where I didn’t need the RDS on the highest setting.  Not a big deal, but just recall having dot intensity levels in reserve. 

Thinking of testing the Holosun 507 Comp on my 17.5 MOS, which currently has the ACRO P2.  I was thinking of getting a 34.5 as dedicated competition pistol as well.  Where I’ll have mostly Gen 5.  I still have a range of Gen 3 and Gen 4, which are fine.  But would prefer 17.5 and 34.5 for consistency. 

so many grocks
and i don't own any...

Shot the 17.5 with EPS setup this past weekend in a match.  I used the highest dot intensity.  I probably could have tried the second to highest setting, but didn't want to have to adjust mid-stage.  It was very sunny at the start of the match and stayed that way most of the day.  I don't recall having to use the highest dot intensity setting in previous range days before, including when I did the CCW quals with this particular setup.  I also checked the battery on the CHPWS Comp, maybe these dots intensity ranges are on the lower side.  I recall the guns with RMR having some brightness settings in reserve.  I think same/similar with ACRO, where I didn’t need the RDS on the highest setting.  Not a big deal, but just recall having dot intensity levels in reserve. 

Thinking of testing the Holosun 507 Comp on my 17.5 MOS, which currently has the ACRO P2.  I was thinking of getting a 34.5 as dedicated competition pistol as well.  Where I’ll have mostly Gen 5.  I still have a range of Gen 3 and Gen 4, which are fine.  But would prefer 17.5 and 34.5 for consistency.

Shot the 17.5 with EPS setup this past weekend in a match.  I used the highest dot intensity.  I probably could have tried the second to highest setting, but didn't want to have to adjust mid-stage.  It was very sunny at the start of the match and stayed that way most of the day.  I don't recall having to use the highest dot intensity setting in previous range days before, including when I did the CCW quals with this particular setup.  I also checked the battery on the CHPWS Comp, maybe these dots intensity ranges are on the lower side.  I recall the guns with RMR having some brightness settings in reserve.  I think same/similar with ACRO, where I didn’t need the RDS on the highest setting.  Not a big deal, but just recall having dot intensity levels in reserve.

We are heading into summer so the sun will be a bit brighter now which could explain the difference.  Same with time of day.  It may seem the same brightness, but the eye is good at adjusting to keep what we see bright.

Anyone using the rmr hd with auto light sensor?

We are heading into summer so the sun will be a bit brighter now which could explain the difference.  Same with time of day.  It may seem the same brightness, but the eye is good at adjusting to keep what we see bright.

Yeah.  I have had the EPS for over a year, and shot it in a class in summer time in Ohio and AZ.  Maybe not quite as UV/bright as Hawaii.  I just don't remember having my RMR on that high setting previously, including Hawaii summer time.  So am a$$uming just the dot range.  I'll get to test it more as plan to shoot matches often.  Additionally, when I was checking the dot pre-match, it's in the safe area (side berm).  I do a quick check of the dot prior to the stage, but typically to verify it's on.  Not adjust brightness. 

so many grocks
and i don't own any...

You should try it. . . you might like it

guns scare me...

You should try it. . . you might like it

Shot the CHPWS Comp in a pistol match recently and it was good.  The brightness was fine, and I think better in a way with a more "refined" dot.  I think I had been shooting with other guns/dots brighter than needed, even on blooming side of intensity level.  The lower intensity ended up being fine and to a certain extent maybe allowed finer shot placement/calling.  I was originally worried about brightness when shooting with movement vice static, but didn't seem to be an issue with this particular setup. For my other dots that can be brighter (I think the ACRO P2), will try purposely setting intensity lower to match intenstify level I was shooting with the CHPWS Comp.   

Overall, I think doing a lot more dry fire recently, as well as taking some tips from other friends that compete and a structured training plan seems to be helping.  Picked up some drill from recent classes, and refinements from tips from those instructors in follow-up.  Working a lot on trigger control/manipulations, esp mimicking more "realistic" slapping when shooting under stage pressures/stress. 

Shot with the 507 Comp in a couple of range sessions and in a match recently and overall liking it.  I had hoped the brightness levels were higher than the CHPWS Comp, but seemed similar.  Not a bad thing as it was fine in the match I shot.  However, just prefer to have a couple of brightness levels higher available.  It was clear and sunny for most of the match, and the 507 Comp on highest was fine. 

I also have a different 17.5 with the RCR, and hope to shoot that setup soon, including eventually in a match.  It's been a while since I've shot with the RMR, but vaguely recall the brightness levels such that it wasn't on the highest while shooting outdoors on a clear day.

Shot a match with 507Comp green recently and initial assessment is mixed, but mostly positive.  Zeroed in an indoor range and initial impression was meh.  Next was pistol match on a relatively bright day.  Overall, think I'm just so used to red dots.  However, one observation is that I shot the match with the brightness with 2 levels in reserve.  It was overcast that day, but there was times when the sun came out.  I read or was told the eye picks up green better than red, so maybe that's what I'm seeing.  Will be shooting this same setup hopefully at least twice over the next month. 

Overall, liking the 507Comp, both red and green.  Pricing is good and performance is excellent, both what I am experiencing personally and what I'm seeing from other shooters locally as well as online ratings/reviews.  Definitely see the hype.  Probably little large for CCW, but know many folks have the 507Comp on their CCW. 

Any trouble picking up the dot or notice any lag in shooting over irons?

Any trouble picking up the dot or notice any lag in shooting over irons?

What distance(s) and what time(s) you looking for?  Personally, in general no.  If anything, I would say I need more time shooting irons again. 

There are a bunch of videos on red dot slower than irons.  I experienced that intially and is very common.  There are a few (at least) schools of thought.  At least from classes I took, training with friends, videos.

First is concept of index.  Where repetition and put the dot where your eyes are focused.  One main reason I've consolidated to primarily shooting Glock.  I still have Sig, CZ, etc, but rarely shoot them.  Messes me up, at least temporarily.  There are many that can adjust with say minutes of dry draw/fire, but I can't. . . at least not yet. 

Second is gross sight picture or acceptable confirmation.  Are you trying to get the same level of target confirmation with your RDS at various distances?  Are you truly doing that with irons?  Or is say more "quick and dirty" sight pictures acceptable?  Say at 3-5 yards.  Backplate of gun, RDS window, top "line" of the optic body, etc.  I read that there are courses dedicated to shooting with NO RDS or irons, but haven't seen videos or read/watched feedback from those who have taken those courses.  Not saying that's good or bad, but interesting to at least test for my/ones self.