The saw vibrates and wobbles a lot because it's a cheapo. It makes the cut too wide and the cut is wavy. There are some gaps where knot meets bloodwood that are filled with just CA. You can see the printed surface of the can in those gaps. It just happens to be a can that blends into the knot beautifully. I just noticed it because there was color outside of the aluminum highlights. I drilled it off-center on purpose because the saw knocked a huge chunk out of one side of the wood close to the knot. If you want better centering, use a ruler to mark an X running corner to corner, and put a dot on the center of the X. Use the clamp to keep the blank standing straight, instead of stiitng the blank flat, then clamping it down. Drill slowly, and pull the bit out every so often to keep it from drifting.