[Diabolical Artificer]

I have thought about making them out of hacksaw blades, but making an insulator is difficult, maybe a bottle top filled out with chemical putty or similar?

I've never bought off Aliexpress, what's folks experiences without going into details about specific sellers?

Some good suggestions there Richard, unfortunately both in the EU but Conrads carry some odd stuff, not come across them before. That's a bit too basic for what I need at the mo kalee, but thanks for the heads up anyhoo. Thanks for looking Craig.

It does look like there's less about than there used to be which is a bummer but on the other hand there must be quite a few folk out there messing about with valves.

Andy.