Then I started working at the lower rear panel with the 29 slots, I wheeled two pieces of sheet metal to threedimensional curvature and welded them together, and started to cut out the slots...what a pain in the a...!
but at the end I felt it was worth the work:
I was afraid that the panel will loose its stiffness with cutting that many slots in it, but amazingly it remained stiff, I guess due to the threedimensional curvature I gave it before!
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