L.D.G:
No offence taken, just pointing out something I'd seen on a website, not a personal recommendation. People are free to make up their own minds, I've not had many dealings with Roedale but I've not been let down so far. I'm sure others will be interested in your experiences of them.
Not sure what you mean by JTEC? As far as I can tell the latest Roedale offering is rather similar to the latest ATEC CMM so not sure what you mean by old hat.
I've got one of the older ATEC moderators: I picked it because it was strippable, and at the time someone on here posted a link to a pdf with some test results done by Sporting Rifle magazine - the results were amongst the best of the bunch and it was about the lightest at 550g.
Having had it for a while, the main annoyance was that bushing unscrews when you tighten up the mod, which IMHO is a major design flaw: I cured this with a turn of PTFE tape, I decided that Locktite would be a bit too permanent.
Other than that whilst it's nice to be able to strip it, I really can't be arsed! (It gets really mucky inside and life is too short for cleaning it) Last time I looked inside, there was some surface damage to some of the alloy baffles (<100 rounds in a 308 win 22" barrel).
From what I gather about the Jager Sporting Arms version of this mod, these problems have been cured: the bushing has a LH thread so it tightens when you tighten the mod, also all the baffles are stainless steel.
I'm somewhat sceptical about any mod that has alloy baffles, in terms of their long term durability, so with the ATEC CMM, it sounds suspiciously light, I don't think I'd get one without making sure it has stainless steel in the right places.
Cheers,
Mat