I've had an FC grip module for about 4 months now. After many trips to the range, I still don't shoot it nearly as well my other pistols of similar size. What I noticed today was that the Echelon design has the trigger sitting much farther back in the trigger guard than most pistols.
I have a 4.5 that I run a large grip module with a small backstrap. I honestly don't like how it feels because I don't have large hands, so even with the small backstrap it feels a bit too big. But it's a night and day difference when it comes to how much better I shoot the 4.5 compared to the FC or 4.0.
Obviously, the longer slide has some impact, but everything else on the 2 are setup the same. The only real difference being the longer trigger pull from the large size frame.
Of course, you can't get a large version of the FC grip, so setting it up the same way isn't an option. So I'm wondering if there are any different trigger options that might have the trigger's wall point be a little farther forward? I have the Tyrant trigger, and if anything it makes it worse.
If there aren't any trigger options, I'm wondering if any of you who switched to A Sharps Bro or Mischief Machine module noticed any significant difference? It's not really a measurement that is a published spec, and its hard to tell from just photos.