"NOTE: Not compatible with later generation Jetboil Cooking Systems (the one's with the square section aluminium valve assembly) but it compatible with the earlier cast brass valve assemblies."
Ah, it may very well be. I didn't know that, we use the two terms as synonyms over here, as far as I know. But I have to admit that I'm no canister connector expert.
Just a quick note about huts on the Kungsleden. Some of them in the northern section (Nikkaloukta to Abisko) sell gas canisters but the supply is often unreliable, especially towards the end of the season. But all the huts have gas cookers anyway. Cheers John