I have found the Wilson leather to be quite soft and not as bulky as the Babolat or Gamma leather grips. In terms of overgrips, I think the Gamma Grip 2 or the Wilson Cushion-Aire Super Tack overgrips are the thinnest. I use Wilson Cushion-Aire Super Tack and Wilson leather on my Surge 5.1. I can feel the bevels better than with a cushioned grip.
Don't be upset by the results you didn't get from the work you didn't do...