When I get back to my home PC (I'm at work) I'll post some more photos.
Tom, the shifter is related to an Albins gearbox, which seems to have a cyclic power shift. On the floor nearby is a plate which mounts in the steering wheel to give button controlled shifts.
The black SLC is not registered, but appeared very complete. The doors stay open on gas struts, the front can be raised 50mm at the touch of a cockpit button by hydraulic pistons integrated into the front shock absorbers. I believe the intent is to obtain road registration with this car. Perhaps Craig can advise us.
The yellow GT40 out front, owned by another visitor, is a DRB. The blue GT40 inside (near the fibre glass 300SL) is a DRB with trick doors that spring out then hinge vertically upwards like a Countach.