Just kidding, that's a nice simple design. I think when I built mine I used enough lumber to build a house. I've ended up making different attachments for different rifles, added movable supports, designed it so I can support the barrel end, or from the breach area where the barrel goes in.....I think I may have gotten a little carried away.....hehe, where were you when I needed you? I really did need someone there to tell me,"Dan, put down the tools, you're going a li tt le overboard here".
I've only taken two rifles apart on mine, it works pretty good, but probably wasn't worth the energy I put into making it. The biggest problem I had, specifically when I supported the breach area was my base (3/4" plywood with lengthwise 2x4's) actually flexing if the end cap didn't line up right...well, ok, the 2x4's didn't actually bend, but the plywood did flex at the middle. Anyways, long story short I added 2 more lengthwise 2x4's and all is well now:) I think the actual problem is that I made the thing so stiff there wasn't any room for the gun to float if everything wasn't "perfect". Mine is so stout now I could probably break a B30 in half if I keep tightening the clamp.
Think we need people like you to save us from ourselves:)
Dan