destructive removal is your only option, if you need it off now this minute.
drill a hole in the key-cover so you can hammer a screwdriver in there to un-thread it anticlockwise. Obviously have to be careful not to slip and drill your forks but, yea, that seems lke the only logical way to go.
otherwise, if you have time, and bought a set of the pinheads, try to establish which key would fit it by talking to Pinhead with the other key key head.
problem indeed!
destructive removal is your only option, if you need it off now this minute.
drill a hole in the key-cover so you can hammer a screwdriver in there to un-thread it anticlockwise. Obviously have to be careful not to slip and drill your forks but, yea, that seems lke the only logical way to go.
otherwise, if you have time, and bought a set of the pinheads, try to establish which key would fit it by talking to Pinhead with the other key key head.