1 mm works 1.5 mm does not work.
The issue seems for me to be self intersecting surfaces killing the shelling.
Does the shelling command trim itself?
Also in MOI 1.5 dies while 1mm works.
Fusion360 just charms through it.
You can see for fusion to make it work you have to remove the fillets and retrim the offset surface!
This functi0n is incredibly important.