Rear Upright Holes

One issue with the Saturn wishbones is that they use 12mm bolts all round.
Unfortunately the MX5 rear upright uses a 14mm bolt at the bottom and a 10mm at the top.
For the bottom I simply slipped a length of 14mm OD 1mm wall precision stainless tube (from ebay) into the upright, to 'sleeve' it down:

The tube couldn't be a better fit on either the upright or the bolt :)

For the bottom I purchased a pair of MX5 poly bushes from StrongFlex.  They agreed to supply the crush tube with 12mm holes instead of the usual 10mm which was nice of them!