Vigier Guitars

Hi I've just acquired a beaten-up Arpege III s/n 350 (1994). Can anyone point me at a manual or description for the electronics as it's not clear to me exactly what's what. It appears to have a volume (with push-pull switch), pan, tone, 5-position preset switch and a mini-toggle. The PCB has Vigier Arpege III on it in solder and fills pretty much the whole control cavity apart from the batteries.
Also, the pots are a bit noisy. How best do I clean them given the PCB restricts access? Should I unscrew the pots from the front and take the whole lot out of the cavity in order to get at them or is there a simpler way?
All advice greatly appreciated.

Looks the same as some of Yossi's basses.
 
Push pull is really cool it makes your pickups out of phase from each other.
The memory pot has 6X2 settings, 6 with the switch up and 6 with the switch down.
The last setting (switch down and "open all the way" clockwise on the knob) is flat.
 
Last knob is a tone knob for the neck pickup.
 
I will leave the cleaning advice to the pros.
Have fun with it, It's an Awesome bass.