Flex, I have put it on the back burner for a couple of months. I need to focus on my G35. The Al. IDPA State Championship is in April.
There are a couple of issues with the G21 that must be overcome first. The heavy slide prevents really light loads. Just last night I put an 11# spring in it. Have not shot it yet, but the slide action feels better. A 200 gr lead SWC feels pretty good at 650 fps. The slide is not slow. I am able to get .16 splits with it.
My Kimber feels much better. I have some 9 round mags that fit into the box. 10 rounds to start is not bad. Problem is I just don't shoot a 1911 as well as a Glock. Maybe more practice would help.
I think the "perfect" ESP gun would be a Caspian hi-cap in .45ACP. The Caspian grip appears to be smaller than the STI.
I also looked at a XD in .45. I don't care for the somewhat high bore axis. The new Taurus 24/7 Pro with a 5" barrel might work well also.