I didn’t gain any girth after trying extreme clamping. I don’t know whether the clamping later affected girth gaining potential. I haven’t gained any girth since, but I don’t think I ever will to any serious extent. I had tried most everything else previously to increase girth, then finally resorted to EU’s as a last ditch effort. The extreme clamping did contribute a great deal toward my shaft skin discoloration. That darkening became a big problem that I later was able to resolve.