I made a bit of progress in several areas.
Cutting is going quite ok, have done the two beams with the most cuts. Two more with only a couple of cuts, because they are the main ones, and one more mixed length one.
The number of puzzle pieces is growing. We will start welding on the weekend after the next long one.

The picture below show the cut off of beam two. This is about the average cut off. Less then 10cm from a total of 49.5m.