Well I'mm looking at that set of books now ...
They keep going and going
and going...
I was thinking the book "Plastic injection molding machine" might be
useful for duplicating
small parts like switch handles or other plastic parts.
If it's the one I'm thinking of (and bought from Camden's), it's a Dave
Gingery book. It's fairly simple, and I am sure it would work (I intend
to make it sometime), but a comment in a UK model engineering magazine
was that, yes, it certainly works, but the 'fun' is making the moulds.
And yes, I want it to make keycaps (no, I am not thinking of dual-shot
moulding), switch levers, etc.
-tony