In reply to ScraggyGoat:
It was standard to use a sigg fuel bottle with an MSR pre 1990ish, despite the possible risks of overpressurization (we were all assumed to be slightly clever back then to not pump the things up untill they became a 'bomb').
MSR brought out they're own bottles around then and changed the thread very slightly on the bottles and the pumps. As an ancetdote; this nearly brought one of Ranulph Finnes and Mike Strounds polar trips to a halt, as they had fuel in old sigg bottles, but had brought two new MSR's for the trip, by fluke one (and only one) of thier Siggs mated with the the pump.
Anyhow, back to my interest Primus say 'compaible with most multi-fuel stoves' but don't list specifically which ones..........
So has anyone mated a MSR bottle and an omnifuel?