Unfortunately I have just sold my car and the trailer so I will have to find somebody to help me next time, because the cylinder is far too heavy for me to lift, and won’t go into my car.
@Peter, how big is your BOC cylinder? overall length x width/radius, filled weight, capacity?
It is not easy to move about. I can just about move it, by rolling it on its bottom end with it nearly vertical. If it is on the ground horizontally, no way could I lift it into a van. So every couple of years I have to borrow somebody “large” to help me, and we drive it to the welding gas depot and swap it.
The advantage of the large composite cylinder I fly with is that it holds so much gas that even if there is only enough source pressure to half fill it, I can still fly to Greece and back with it. And I carry two of them on long trips.
Yes sounds in the right order of magnitude.
A large cylinder (which, if composite, is still lightweight) removes the huge hassles of getting oxygen refills while on a trip.