I just switched to 3 under about a month ago on the recommendation of another trad shooter I met at the range. I used to have a notoriously crappy release but, since switching to 3 under, my release has become the least of my worries. I don't know why but the improvement has been tremendous. Now my 30 yard groups are better than my 10 yard groups used to be.
All I can say is; Thank you Charlie from Wichita Archery Inc.