Last night I made the last handful of frame tubes and started welding the frame up.
I added three connecting tubes on each side of the central upper frame tube and one between the newly added upper frame tubes and the vertical frame tube that connects the upper and lower frame tubes. Dang hard to describe and I forgot to take any closeup pic of it but it can be seen in the fourth pic below if you look closely.
After that I removed the wheels and forks and lifted the bare frame up on a pair of stands to make welding easier, I haven´t weighed it yet but it feels like can´t weigh many kgs.
Some are probably wondering why I don´t use the frame jig while welding the frame. I chose not to because 80% of the frame already is welded so it should stay in shape pretty well, and I will still have to align the wheel axles by modifying the chain tension blocks for the rear wheel when I am done so it doesen´t matter if there is some minor movement in the frame now. Therefore I find it better that the frame can move freely than to build in tension in it.
I hope tech inspection find the welds acceptable, I will take a bunch of pics before I paint the frame just to be on the safe side.
Cheers!
/Anders