I ended up having to hand beat the channel while in the press to get it right.
Cost me around $30 to make the frame.
The glass came off my insurance as it replaced the old one which was broken!
The side plates were downloaded off the internet and are an exact copy of the Caterham items, I had them computer machined from 4mm aluminium.
All then powdercoated to match the roll bar etc.
Lots of measuring and dicking around but am quite happy with the result.
