You're on fire Nasher!
I really don't think that altering the speedo drive will achieve anything, it's ludicrously tight in there.
I'll get a picture when I've done some chores and can get to it.
I had similar doubts about countersinks.
15mm offset discs sound like a much better solution all round as it's the spacers that are causing the problem. My discs have seen better days to be honest but I hadn't budgeted for new discs, they certainly don't need replacing just yet.
I think I can see the financial event horizon!
