As and when ready - no rush - it IS Xmas time after all - as if you could miss it...
Oh - and don't forget... All cylinders MUST be transported upright.
When I were a lad we used to collect our cylinders in the back of a Talbot Alpine wedging them in with scrap tyres so they didn't roll about . That was oxy, acet and argoshield (not all at the same time though )
Dead easy to transport a bottle upright in a car ,get one with a sunroof ,drop bottle in open sunrooof making sure base is in the cup holder-sorted LOL