It seems a bit extreme for me and not in a good way. If I had a new ST and a spare £3-4k I think I'd have got a faster car in the first place. I know anybody can but a faster car but your ST is a bit more special, but rarely have I seen a highly modified car that actually works as a useable package.

I'm impressed that you've given it a go and will be interested to see the progress but I'd love to see how the car now behaves in town and on twisty B-roads.... might be a bit of a handfull?