Slow movement in the trenches of my ISDT replica campain.
Grafting the rear end bits from one rigid frame on to the front of another rigid frame.
I molested (ehh,.. destroyed) a orphan swingarm frame for the 1" tubing.
Found that swingarm frame tubing has a massive wall thickness of 2.7mm .
This rigid frame has insides of : bottom tubes 21.5 and top tubes 22.5 mm. (1.95mm and 1.45mm wall thickness)
Yes, Ariel used different sized tubing, the top tubes frame parts are thinner walled then the bottom tubes.....hmmmm
What fun I have !