I have both and carry the 19, but I really like this setup as well. g26 with x-grip adaptor on a g19 magazine, the fitment of the adaptor is incredible
I have decided I may never personally answer this question. I went to the range today it was simply a 26 day. I ran the 26 better today be it from concealment or low ready from 3 yards to 25 yards. I found I shot better with the stock mag baseplate vs the gap or any of the pierce ext from +0-+2 and everything in between.