Hello :-)
Ive currently got my hands on a k300, it works great minus the motor mechanical side of it doesn't exist at all - It's been taken out as it gave up on the previous owner.
When he took this apart he threw the legs away with the intention of pulling the screen out manually, however the screen can fall out of the unit and dangle by its ribbon (not good)!
SO...
Im wondering if you guys can help or at least point me in the right direction (don't point at the door!)
I need parts, i want to if possible get a motor back in the unit, and i could really do with the legs, i think they would be plastic ridged one which run on the gears.
If i have no luck finding parts, im going to attempt to my own motor in - which may shoot the screen straight through my rear window

Well not quite - but i'll be looking into making the unit 100% manual proof!