That's not an easy task to weld the inner arch, but this is done now :
Steel sheet formed to suit the curve of the arch :
And welded :
Looks ok now, with plenty of room for the wheel and suspension!
Then started on a crossmember reinforcement, as the seat is bolted directly on it. Started with a 2mm thick steel sheet :
And with some captive nuts added :
Then, decided to make a front bar on the rollcage :
Unfortunately, my MIG ran out of gas, so more welding to follow...