While on the subject of wallwarts is there anything special I should be looking for? Some are switching while others say nothing (is this just unnecessary marketing?) I'm in the UK so need a 230v model, none of those pictured are. 24v AC and >750ma with a 2.5mm pin - is there anything else I need to look out for?
You want to make sure it IS rated for 24VAC GREATER THAN 660 mA.
I know higher is psec'd but I've run plenty with 3/5 of an amp. It's pretty straightforward to graft on a 2.5mm connector cable 9I find actually wiring the plugs to be a pain though). Or I could send you a 2.1mm jack if you can find a proper wall wart with that connector...