In reply to Rob Adie:
> ...Snip... they are awesome, my one problem is it is quite difficult to get it to simmer and it is a bit hot for frying stuff. But they are great.
Try moving the flame spreader down slightly so that the fuel doesn't lose contact with the hot metal when switching to simmer, (bend the arms up 1 or 2 mm, you'll need to adjust them so they grip again) I found that it helped. Also seems to be less of a problem with white gas/petrol than with gas canisters.
Steve D