Oh believe me it was a pain. I got a series of engineering shop to attack the swinger. In the end it was done. The list below details what was done…….as far as I can remember.

Shock linkage mount moved

The hole in swing arm widened to centralise the shock (NC30 has it off to one side)

Spacers for the rear wheel to make it track in line with the front

I’m sure there was a little more…