Take a look at this video kzfaq.info/get/bejne/pt93fMmq3b3clKs.html it shows engraving on stainless steel. Also take a look at the comments, there is a recommendation of a tougher carbide tool.

Definately. I'm doing a couple more viideos, one is cutting some steel. Half way through I took a look at the video and guess what, it wasn't recording, doh!

The saw blades are very old and probably a bit too heavy duty, size 4, these can be obtained from Cooksongold, Cousins UK or HSWalsh. Along with the frames etc. For most jewellery the 2/0 blades are a good general purpose size.

If you look in the description there is a link to the documentation on GitHub. In the documentation there is a link for a Google search which will show you where to get the solenoid. I ordered them up from a supplier in China.

Duncan how much would one of those cost where if you made it I'm very interested thank you

it is what it is.

I thought it was very interesting! Thank you!

Water is fine but it bubbles up more than meths and meths has a better wetting action although you can add a little washing up liquid to the water and it helps with wetting.