I have to say that my LK 4003 satisfies me. I replaced bridge and pickup cover but just for aesthetics. I rewired with two stacked vol and added tone adjustements to the 3 way switch. It’s a nice bass that plays well. Quite aggressive, with distortion at the neck pickups but it fine for what I play.
I have a real 4003 that is a very different beast but frankly when I am playing with her, I cannot avoid thinking .... and what’s about if they steal her while I am having third beer after the gig?