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Hi and thank you for this very useful OpenScad source code, much appreciated.

I'm making an adapter for a Prusa i3MK2 hotend fan from 30mm to 60mm and in the process I think I found a glitch in your program.

When I change the value for az_mani = 0; to anything other than zero, then the manifold turns but the cone and large adapter fan plate remain where they were. I'm using OpenScad to do this.

Is this just happening on my computer or can you verify that it is a problem elsewhere?

Cheers, Mik