It's nothing flash, but it's worked for me. I had some MIC strat necks that were about 2mm thicker than genuine "F" necks, but the neck pockets on the bodies were correct depth, so rather than routing the pockets deeper, I chose to plane the neck heels down.
Here is the jig:
Attachment 37047
The whole thing can be clamped to the drill press table when drilling, or slid across the table when using the Safe-T-Planer.
The neck in the jig is already planed, drilled, finished, and fret levelled. Ready to go into the body in my other thread.
I just put it in the jig to demonstrate.