[BAracer]

So...

I've got some bad news, some good news, and some bad news!

Having got a working set up, I thought I would test my old SCP-2 handle in the arrangement to see if it was actually working. I substituted it in the set up. Switched on. Green trigger light came on. I pulled the trigger...a short ascending whistle noise and the light went out. Nothing.

So I reverted back to the new SCP-2 handle that worked 5 minutes ago. Nothing.

At first I thought I had blown up the metal cartridge, but a quick check with my new multimeter showed that I had killed the power supply...0 volts.

So...

Bad news: I have burnt out a second power supply
Good news: I now know that it is the original SCP handle that is the cause of the problem
Bad news: In all my fiddling, I have obviously damaged the electronics within my original SCP handle. What chance is there of ever getting that repaired???

So on the hunt for another power supply, as I don't feel I can return this one as faulty goods!

P.S On the whole, I'm happy.