Thanks for you dedication to this Nasher, I'm sure we would cook up some devious plots if we were closer neighbours!
Right. I've trawled the misty web and only found one reference to offset for "R" discs @ 11mm which just sounds wrong? maybe they have measured the offset to the inside face of the rotor?
https://www.ebay.co.uk/itm/294292137...Bk9SR97W0PipYw
My Ti bolts miss the speedo by about a mil at most. (In the standard forks with no disc spacers.)
Original bolt heads are 7mm high.
Ti are 6.5
Some random button heads are 4.5 (could be 4.2?)
My carrier is 5mm thick.
Counterboring might be the way forward, but the carrier would go down to 3mm using button heads. That might be pushing it? What do you reckon?