I've been asking visitors to bring me party kegs so I can refill them with my own beer. I used to do this in Poole and I generally know what I'm doing. However, I was given a keg of Doom Bar (horrible stuff, half of it went down the sink, but I did struggle manfully) and it has a different tap and top vent system. I can live with the tap, but I don't seem to be able to get the top vent out without damaging the can. has anybody any ideas on this before I resort to the nuclear option. Many thanks in advance.