I'm probably a little late, but I second Roy's "no arrow shelf" rule. I made one on my first stick bow and I hate it. Also made too deep of a pistol grip on it, and I hate it too. I actually don't even shoot that bow anymore and have contemplated cutting the thing in pieces for firewood on more than one occasion.
My favorite grip on a stick bow has become, well, no grip. Just trim it down like Roy says. I don't even use a leather rest anymore. Just shoot off the hand. Much easier, IMO. But those built-up rests are great too. Very easy to make and use.