The original power supply build quality was pretty poor, so i have doubled my spend and got a new power supply
...30v, 2.5amp Varibale
DC 0 - 30V (2.5A), fixed DC 5 and 12V (0.5A) outputs
Separate analogue voltmeter and ammeter
Current can be limited from 0 to 2.5A using the ‘current’ control.
Fixed outputs through ‘snap-on’ terminals and variable supply available at pair of terminal posts
Overload and short circuit protected
It is less amps than the other one, 2.5 as opposed to 15, however it has more volts, 30v compared to 15v.
It also has overload and short circuit protection built in, unlike the other one, so i am a bit more confident in trying it out without a garden! I'll still have the fire extinguisher close by though!