hmm well I tryed it with a pc psu, from the 3.3v rail. The psu was upto 16A but as soon as I made the connection the OCP turns the rail off...
Remeasued the resistance this time getting 0.6ohm.. its too low
I dont think ill bother with a die sim, unless someone can suggeest a heater thats cheap and not from ebay, and also some suitable type of insulation (also cheap)