Hi mate, glad you like it. Interesting you mention the top horn, a year later the design was changed and the horns brought 'in' a bit more. I have had a few Passions now and I have to say I MUCH prefer the Schaller bridge to the newer Kahler units. I suppose the chrome looks a little out of place, a black one would fit better visually, with black hardware...
I will PM you a spec sheet/manual that explains the circuit in the bass. Very quirky but lots of unique sounds in it. You can remove the control knobs by popping off the 'lid' on each knob IIRC... My bass is a bit different, and Vigier changed things about a lot in the early days.
Post some clips of you playing if you can, and I hpe you give it a good and permanent home!
Cheers
ped
P.s found this pic recently, looks like your bass! (actually it's a series 3 but a similar colour!)