Right next item - Im looking at a 6 point bolt-in cage, all the big manufacturers do them for the phase 1 Clio, OMP, Sparco, Safety Devices etc. But the question is what sort of a job is it to fit a 6 point cage. Assuming all the rear will be stripped out, what else needs to be moved? Are they truly bolt on or do you have to weld mounting plates in first?