Speaking of bolts, head size, etc...
Am I the only one annoyed by the grip bunching up around the bolt if you try to get the bolt close to fllush? Doesn't happen all the time, but with common bolts and Mob, it was happening to me all the time.
So what I do now is pre-mount my trucks before gripping, so the bolt sucks into the wood like it would normally when you set up a board, it creates a chamfer to the hole. Take the trucks off and grip the board, the grip kinda sinks into the chamfer better when you do it beforehand. Then when you mount your trucks again, the bolts seat nicely and grip doesn't pucker nearly as much.
I know that seems "extra"... but when combined with a larger head bolt like Vintagebody is talking about, it hasn't failed me in my last 7 or 8 decks.