That's a good idea.
Incidentally I tried out this grip today and found it maybe a little more effective at managing recoil, but for me so far I think it's slower to acquire. That is probably just a lack of familiarity with getting the index finger really buried like that though. I am also in the habit of keeping my arms a little straighter than I think I should. I've got a course coming up in a couple of weeks at which I think I'll try this out a little more, and I might try to get out to one of Rob's nights in Abby as well.
Interestingly this grip worked fine for me even with gloves on, which I really did not expect. I have big hands and I thought the support side index finger would really screw with my trigger finger, but it wasn't an issue. Shot pumpkins from about 10m - 60m with a G17k. Found the sights easier than usual to track during recoil at the close stuff. Not sure if that was the grip or the lighting, but I think it might have actually been the grip. It's a very subtle change from what I'm used to so I didn't expect to pick up any difference but subjectively it seemed to be a little tighter. I went back and forth a few times and that was my feeling throughout.
But I didn't have a timer going or anything, or even targets other than pumpkins, so no real objective data for anyone, unfortunately.