thanks i,ve just play with shmel 2 inner and outer caps on prim kompakt it's cool what is sombrero specification thicknes and how many mm is "bigger circle" depressed?
An amendment for the Prim would be 3 cut-outs around the circumference to match the 3 lugs on the burner bell.
outer cap inner cap original outer cap original inner cap shmel 2 outer cap shmel 2 inner cap shmel 2 PK inner tube longer 11 mm