My binghams jig was off too, what I did was mark center lines inside of the jigs holes then use a flashlight that goes on my hat or head to look down in there and line those center lines with my lines on the riser and limbs, works great for me. Yes alot drill through the limb then put a lam over the hole also a very accurate way to do it. You can also go to a machine shop and they should be able to make you a jig that you could have talored to match you bow design. Hope this helps!