There where some areas I wanted to double check for (hidden) rust so I started taking all parts out to finish some welding jobs.
Some filler in the corner still annoyed me and did indeed cover a bad repair by a previous owner. Now fixed.
Stitch welded the rear battery box cover support ring.
Welding the aluminum M400 to B20 bellhouse
With the gearbox out the hole created by cutting the starter mount while creating space for the Tesla battery heater could be closed of. As well as repair the tab for the cluch cable. Nicely welded by @carjansen thanks!
Unfortunately I do not have the tools or skills to do that myself.