You obviously have an in-depth knowledge of suspension kinematics and a thorough appreciation of the impact of subtle geometric changes - and are prepared to go to, it seems looking forward to, great lengths to expand your knowledge, which is all very commendable and I wish you every success. But your comments seem to simply bring me back to my previous (tongue in cheek) summary that many of us stand a good chance of easily spoiling what is widely regarded as a decent handling standard car.
I use my standard-engined 172 Cup only for hill-climbs and bought it a couple of years ago from a hill-climber / sprinter who had spent the previous 5 years attempting to optimise the front & rear spring / damper rates, suspension ride height / camber / castor etc. etc. Consequently, the car is fitted with BC coilovers, bump-steer kit, adjustable top mounts, PMS rear anti-roll bar, front wheel spacers in combination with no rear wheel spacers to help minimise understeer, and the wheels are fitted with R888Rs.
I am now in the period of the car's ownership where things are beginning to require replacement and, perhaps in naive ignorance, I am thinking that there must surely, by now, be a well known, well documented, widely acknowledged, near-ideal set-up for such an extremely popular track / hill-climb / sprint / competition car that suits spirited driving for most tarmac conditions? So, let's say with a 25mm reduced ride height and with a minimal amount of fuel on board, what are the ideal camber / castor / toe angles in combination with ideal tyre pressures to optimise turn-in? Basically, we are all starting with the same chassis (with or without the stiffness of a roll cage) so why are we all spending years seeking the holy grail as individuals? In isolation? There are huge amounts of "go-faster" goodies being pushed by no-end of suppliers but the Mk2 Clio has been around for more than 2 decades now, so... surely, the magic configuration (that works for most) has been formulated by now? So, if anyone on here is prepared to share the magic, I'd love to hear from you. TIA