Fixing the broken rib was relatively easy, we
made a filler piece and Aad TIG welded that in place, then it
was a matter of sanding and grinding. Polishing the primary
was a lot more work, Aad started with sanding with finer and
finer discs and then used Johans giant polisher for the final
buffing. As I am writing this the engine is already in Groninger
for the rebuild, and we have done more work on the rest of the
bike, so I need to catch up with writing this buildthread!