Alrighty, some good ideas here...
Well, as far as practicing on this thing, I've been there. I have been customizing guitars and basses for years, so no need to practice on this thing really. Fretless would be ok, but I would rather have this thing sounding better first. Like I said, I might be putting some different pickups in it, and getting it to sound good. It sounds decent now, but it could sound better. I am not investing too much in this plywood body anyways.
I was thinking about getting a jazz body, and making a franken-jazz (maybe with a lefty body strung righty). But, then again, I could sell this off for someone to learn on, and buy myself an Essex. But, I need to renew my supporting membership so I can sell stuff here.
Anyways, I am going to be making adjustments with the pickups that should give them a bit more beef, and cleaning this thing up in general. With my USA Peavey Foundation S I just got, the whole black bass thing is covered, and very well I might add. I don't like having duplicates of basses. It's bad enough I have 2 red ones right now.