I thought I'd throw some of mine up here. I haven't got any photos of most of my 1/12th collection, but I do have a few UK specific chassis that I'll have o get dusted down and photographed.
As AYK have been mentioned, here are a couple of my AYK RX2000s. I started racing back in '79 with this one, and still have it. It had a DeTomaso Pantera body on it when I bought it, I just wish I could find another to replace it.
and another in my collection, complete with paper thin bodyshell
Now a couple of UK specific cars, from 1980/81 when we were still racing on polished wood hall and gym floors before we had discovered carpet. My Schumacher XL that I used to race, chassis is made of folded 2mm thick polycarbonate with a floating rear motor pod so it doesn't tweak the chassis which is so soft you can twist one end to 90 degrees to the other end. The centre post on the chassis had a Demon ESC screwed to the top of it, the ESC was so big the receiver was stuck underneath it in front of the batteries. Very soft tyres all round, coated in silicone sealant stippled by rolling the tyres across a board while wet, then left to dry.
Finally my Phantom, made by Phantom Cars. This was originally a scratch built car that won the 1980 Euro championship and demand meant they put it into production. Again, chassis is 2mm polycarbonate with RC12E front blocks. A single centre post on chassis mounts the radio tray for the MSC. Wheels are all sleeved as the silicone coated tyres lasted one race before the silicone spikes were worn off, so it was useful to be able to replace the tyres easily. Front wheels are Phantom alloy wheels, rear axle is a Schumacher ball diff with sleeved wheels being a standard part of the diff. Batteries are held in by a large O-ring on either side, so the battery can float in the chassis and not prevent it flexing.
