If anyone is interested, I have a spare 385mm torque arm (from an 1100S) I would be willing to swap for a 1150GS (365mm) torque arm.
I swapped my r1100s with a GS one to give a bit more ground clearance , trouble touching the ground now but hay ho .
Also Daytona M star boots are a help if your short ,as they have a built up insole , only up to a size 8 I think though.