Like Scott said get all the binghams supplies,and make sure to get there limb bolt alignment jig,I use tongue depressors I have read that some guys have scoring from the thumb screws.What I do is put a piece of of painter tape on the bottom side of the limb and wrap so it cover the top of the limb or the top of the wedge and leave a inch or so and cover the top of the limb,the same for the bottom of a little longer than the jig about inch.Then put the jig losely on the tape line it on top of the limb and draw a line across the bottom so you have so you have a point of refrerence take the jig off,and now find center of that line depending on the width of the limb you are using.Then go to the top of the limb and find center.Then line up the center line on binghams jig with the line that you have drawn on the limb do this top and bottom and tighten the thumb screws you use the same procedure for drilling into the riser...I have found the aligment pin doesn't always go deep enough I think that I am shell shocked because I have drill to fare into the limb and have come out the top side of the limb so I drill enough to give me a reference point and finish off with a drill.I also use brad points bits they make the drilling nice when you drill into dense wood...but my advice is that go find some 2x4 thing strips of wood half inch thick and practice using the jig use the 2x4 as your riser block and and use some 2" latice or rip some wood and sand them to a level smoothness...I hope this helps you out,I never had the aligment jig when I started building take down, and I have pulled my hair out trying to get the limbs to align...but get the jig its worth every penny...Hawk