Yes I have 15 mm spacers all around and lowered it quite low , lower than the grand sport . I also just had the full geo down and it drives fine . I would recommend if you go down that route to go to a specialist as these cars are very sensitive to changes . I took mine to wheels in motion in Chesham .
To be honest if the British weather has got into them and they need to come off the car to strip there is a fair bit of work involved to get them off the car.
Give them a good soaking with a rust penertrant.