It's not illegal to own a still, however I would be concerned about getting a still delivered to the address I was stilling at.
I have a few mates who have ordered columns from abroad - it was just the column though, no boiler - it was declared as "air conditioning equipment", to be fair when you see them broken down, its all pipes and valves, we have in our head its a still, but the the casual onlooker, its just pipes and valves.
I guess its a little different when they are shipping you a boiler though.
They do an option for strapping onto a keg - is that an option for any of you? in which case, when are you ordering your air con equip?
BTW - none of the packages were opened - i would guess they would be x-rayed in which case - pipes and valves.