I like thumb rests and have Zero Mod rests on most of my basses. These mount using the pick guard screws, thus no new screw holes are required.
I wanted a thumb rest on my new Fender Aerodyne Jazz bass but could not use a Zero Mod rest because the Aerodyne has no pick guard. The idea of drilling screw holes in that glossy body made me nauseous. 
Fortunately I found the ThumbRocker on eBay. This little rest uses the pickup mounting screw.
It installs in a few minutes, is much more comfortable than resting the thumb on the pickup, and positions the hand for plucking right over the pickup. And even better, it’s dirt cheap. 