Check your pads for square with side of riser block. If you don'=t have a good drill jig, you can put the insert in the center of riser best you can in the right place from end, drill the limb for the 5/16 bolt, bolt them on and string from tip to tip and adjust for alignment, then drill thru limb and into riser, then put an overlay on back of limb to cover the pin hole. Many ways to skin a cat.