Well you guys it took a while but I finally can call the build of my Fenderbird finished.
The pickup sits in the right spot and I actually had to give the pickup a backcover 'cause if you can recall...
...it was open on the back, making it nearly impossible to put foam underneath in order to make it height adjustable.
So now the bass is fully playable and has cool growling sound due to it's mahogany body, P-bass type pickup and Maple neck.
And as you can tell by this picture it's also a fingerprint magnet.
And I'm putting it up for sale as well, anyone who's interested please feel free to contact me.