Just a quick question, I have a grip that I'm going to use (its a pistol grip style that came off of a tree in my backyard will be treated for use in the water) and I just need to know what the best way to drill the hole for the shaft is. It has a midlength barrel, so I'm not sure how to go about it, or if I just need to saw it down a little more. Thanks for your input, I'll get pics up as soon as it goes in the water!