Did a search, found nothing. Planning on mounting HB's with rings on a tele-style setup. My question is, what is a good thickness for the rings? Stewmac has them (flat bottom) at 3/8" or 3/16" and Grizzly has them at 0.082" thick. What's the thickest I can get away with? Believe it or not, I do not currently have any kind of measuring device avaiblable.