Originally Posted by richie967
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
It's got a relatively low amperage capacity, which means you will be restricted to very thin (.010 - .016") high resistance wire like stainless or nichrome.
I use .011" single strand stainless steel fishing leader wire.
Thicker wire, or materials like steel or carbon steel guitar string might not work with that PSU because of its limited current handling capability. Check with the hot wire calculator when choosing a wire for it.