Re: [CAD_CAM_EDM_DRO] Re: DIY probing

> Seems to me your project would be much simple, quicker and cheaper to
> accomplish using RTV rubber to cast a mold of the inside if the horns' bell.

Unfortunately folks aren't going to let me smear mold release on their
200+ year old antiques made of brittle deiznicified brass and then
fill them with a material that releases acetic acid when it cures...
If I were going to do a casting I'd use something in the way of a
plaster.

The default method is to cut a wooden template that fits the inside and
then push modeling clay around the edges to get the countour more exactly,
then trace this.

Chris