Here's another little problem that surface once the clamps were off. The small area of the top between the neck and the pickup is unsupported underneath. The glue clamps introduced a varying amount of bendiness. If I didn't do anything about this, the pickup would sit all crooked. I found a piece of scrap maple at the right thickness, and wedged it in on the low (left) side, and clamped it down on the high (right) side. That ought to keep it flat. It may also help reduce vibration at the pickup, which might help avoid feedback.