Been plodding away on the bike, think it's coming on well.
Had all the parts arrive, i hope the idea works!!
I've gone for 2000 R1 forks, BMW R1100rs swingarm and rear diff, R1100rs wheels.
You can see the in the pic a rough outline of the frame set up.
The trail is expected to be reduced by roughly 2cm's, but the swingarm is 10cm's longer than stock.
Hopefully i've understood it correctly!!
The fork bearings need looking at but otherwise the R1 steerer tube is a good fit.