If this has been thought of before, sorry for rehashing it.
I don't like resting my thumb directly on the pickup coil on this style bass. I fear it would eventually damage the windings, even though its covered with the cloth wrap that they cover the windings with. Also, its not all that comfortable with that ridge from the top plate sticking out. So, I cut the end off of a Dimarzio Stratocaster pickup cover and smoothed down the cut with sandpaper. It fits perfectly over the end of the bass pickup, and is held in place by the pickup height adjustment screw. A much more comfortable thumb rest IMO, and it protects the pickup too. Of course, this one will be painted black (all I had was a cream-colored cover). When black it would be practically invisible.
