If you do you know you'll have a small guaranteed market for that part. If your capital outlay is small, or none, then I say go for it.
-Sean
--- In newmellotrongroup@yahoogroups.com, "Thomas C. Doncourt" <tomdcour@...> wrote:
>
> I am tempted to make a mold of the red plastic part and cast one under
> pressure out of polyurethane-I'm guessing the originals were styrene but
> maybe acrylic (possibly too early for that material, can't remember). I've
> been making missing keys and other parts for my weird little collections
> in this way so why not a switch top?
>