Thanks Calum - I will jack it up & see how it goes. The belt has never overhung the edge of the sprocket, as shown in your excellent write up - in my experience anyway.
Hbats - thanks for your advice, do you remember the cost of the new hub?

Thanks
Andrew

M3W
986 3.2S
Frogeye
Midget 1275
BMW i3S
Tesla Y
New Ionic 5N
BMW R12 Nine T
BMW K1300S
Jet 200