I use two part 5min epoxy, and unlike most folks I opted for 4" because I wanted the extra weight upfront. 4" gave me about 40 grain, and with my 150 gr points for a total of 190 up front they fly pretty well. Only thing is when I come to full draw I'll feel the little bump of the footing coming up on the shelf even though I tapered it (footing). Doesn't bother me, kinda like a built in clicker. I also place the forend of the footing flush with my insert so there is a smooth transition between my points or broadheads and the shaft. I'm using 5575 GT traditionals. I think the footings were some 2216s Eastons I had laying around.