One more.
(somehow I can't hold back)

Harley Benton B30 NT Acoustic Bass Series 'Deko'
Sold for decoration only..... We'll see about that.
It came with a hump between fret 10 and 17 and had quiet a few sharp fret ends, the bridge saddle seemed to be too low, it was truly unplayable.
First thing I did was level out the hump in the fretboard by leveling the frets, it's alive and plays (the hump was not that high but rather long).
Next step was Removing the sharp fret ends and giving all the frets one final level session, after that I crowned and polished them.
Also put a shim (half a millimeter thick) under the bridge saddle, as I already suspected it was set up too low, while I was busy working on the bass I gave the nut some tweaking as well.
Another thing I needed to do was tightening all the tuner screws and nuts, they were all loose.
Put a set of D'addario ETB92 Nylon Tape Wound strings and a 'de afwerking' thumbrest on it and gave it a final setup.
The action is a little under two millimeters at the 12th fret, precisely what I like.
Given the fact I bought this bass as a 'Deko' for only 45 euros I can't really complain it needed some TLC.