I'm going to rebuild another P-Shorty in the near future, decided where I want to go with it.... 51-P-Shorty!
Pickup will be a Haeussel P-Bass OldStyle humbucker, the pick guard will probably be tort, everything else as much stock as possible.
The pickup will get a switch for series/single/parallel mode. The controls will just be passive volume and tone.
But first I need to finish my full custom build 12 string.... Now there is a extra motivation to hurry and finish it.
More details once the pickup and bass are ordered and the rebuild starts.