Thanks all. rkeywood yes I agree 100mm is low but there is an idea afoot to possibly shorten the sump to match the height of the bell housing (which cannot really be changed) as a part of alterations for baffling, since it must stay wet, the modification would include some means of retrieving the lost oil capacity shortening would incur. Even so 100mm will probably be risky low 110/115 being more likely. I plan to have a minimum of 65mm below sump (which is the critical measure) for track. I'm talking to IG Racing about (limited) choice of steel dampers and he favours Gaz believing these have superior seals over others. Also he sources them in component form and builds the up to his quality control and your spring/valving requirements. The HSCC regs require an individual 'passport' issued post inspection, which is a separate issue to regular scrutineering. Rumour has it running over the car with a magnet is to be expected....... Paul, I like the idea of different wishbones but I fear that would fall foul of the Passport/regs process, I have a feeling the days the 7's cleaning up are fresh in their memory and they don't want it happening again!!