I enclosed the Temperature controller in a housing and tested it all again using different settings and it seems to work well. I did however burn my fingers again and they're hurting like hell. The thing about these heaters is they don't really conduct heat through the air that well and the only way I could think of to test them without a thermometer is to quickly touch it lol.
ps I didn't test it on the computer this was just for the photo, I did the right thing and stood barefoot in some water while the electronics balance precariously on top of an open tin of acetone. :-P