Raised the driver seat by about 1in on my RF on the weekend.
Was hoping to raise it higher but one of the 4 bolts won’t come off (see my other thread - I have since ordered a set of rounded bolt removers).
Used some M10 50mm Partly thread 1.25mm fine thread bolts (https://www.ebay.co.uk/itm/163379375631?var=462688608372) and a stack of washers (FORM A FLAT WASHERS TO FIT METRIC BOLTS & SCREWS A2 STAINLESS STEEL M1.6 - M30 | eBay) wrapped in gorilla tape for ease of fitting.
Hopefully, once the bolt remover arrives, I will remove the 4th bolt and raise the seat by another 10-15mm
Note that I had originally purchased some bolts and spacers from Wickes - but the bolts were 1.5mm thread pitch - but I needed 1.25 thread pitch).