HI Stu, I know this is an old post now, but can you advise which kit you bought?

They have the 922401 kit which states it lowers an RS Turbo by 35mm, or they have the 922404 kit which lowers a 1.1 by 35mm and an XR3i by 20mm,
I dont want to go too low and have to do the job twice,
Thanks
Rich