JK, they still available? What make etc...?
Zanx,
These work by applying pressure, which then creates a circuit, no trigger.
Here's a copy of the leaflet that came with the cutter, I ordered it from a company called Bob Richardson Tools, if you ring speak to Bal on 01384-482789, fax: - 01384-481888

I have just checked up the purchase order, I paid £149 + VAT for the cutter with one pack of blades and I bought 2 more packs of blades for £7 each + VAT.
Unfortunately, I didn't know where he was getting it from, but it might be a good idea to try Rescut direct, you might be surprised.
As far as I am aware, Bal uses two manufacturers, this being one of them.
HTH
Now Motardless