I have a vintage 2.0 liter percolator.
I want to use it for camping kettle.
But its glass knob looks some brittle.
So, I exchange it metal one :
round stainless sheet x 2
copper rivet x 4
triangle stainless knob.
Steel knob is adhered to the round sheet
by spot welding.
The result is satisfied. :)
I will use it main cooker in the field.