Building up a new welding and sheetmetal setup

Slight miscalculation with the height. The cylinder sticks up too high to slide this whole mess under the workbench like I really wanted it to. I also really wanted to have 2 bottles to switch out.

option #1 is staying with one bottle, and cutting a circle out of the center of the bottle deck for the cylinder and dropping it down to clear the bench, then build something to support it from underneath. The cutout would also hold it in at the bottom allowing only 1 chain to be needed.

option #2 shorter castors to fit under the workbench so I can keep 2 bottles on it, but will make it sucky to roll.

Option #3 say **** it leave the casters on it that it has now, put 2 bottles on it and find a different place in the shop to store this thing.