Drill a hole for a new knob.

[Jazzdogg]

To minimize tear-out at the circumference of the hole being drilled, use a sharp brad-point or Forstner bit (not a metalworker's twist drill), let the tool do the work (i.e., use minimal pressure against the drill), and slow down as you're completing the hole.

If you're worried about "blow out" when the bit emerges, position a sacrificial piece of solid stock against the back side of the piece being drilled to support the wood fibers where the bit breaks through the wood. To prevent blow-out while assuring the hole is drilled in the correct location, drill a small pilot hole from the inside of the control cavity, and enlarge the hole to its final size by positioning the center spur of the brad-point or Forstner bit in the pilot hole and drill to final diameter from the outside into the control cavity.

Good luck!

 

[Bassamatic]

It is quite easy to check the phase of the pickups. I even had a diMarzio P Pup that had the 2 halves out of phase with each other - very weird as only 2 strings were out of phase with the other pup.

Connect a sensitive analog voltmeter at it's most sensitive DC Volts setting to your output jack.

With one pup on at a time, please a steel tool NEAR as possible (not touching) one of the poles and pull it away quickly.

The meter will produce a short movement going + or -.

Test all the poles - repeat with the other pup. They should ALL be the same if they are in phase.

 

[SurrenderMonkey]

make sure you leave enough in the control cavity for the pot. I was only lucky...