See the CAD version here
After making the drawings and a template it was time to actually
modify the frame! We bolted a steel plate on the table and welded
the frame to the plate. The axle plates were also fixated in
place so nothing could move while we replaced the tubes. We
bent the tubes with some extra material on each end so we could
trim them to fit
At the axle plates we added some slugs and drilled holes
for plugwelds for some extra strength. On the pics below you
can see the difference between before and after.
The front of the seat and the oiltank will be narrower, and
the whole seat will look much less massive now. The curved bar
where the rear fender mounts to will be closer to the wheel,
and the battery can be mounted a bit further back.
Aad TIG welded everything, and his welds actually look much
better than the factory ones did. Now the frame can go back
on the table in my own workshop and soon I will be testfitting
the Panhead engine for the first time!