Played around with Oxy/Acetelyne when I cut the old springs and axle off my boat trailer after the bearings exploded on I-5.

Green is oxy and red is acetelyne. (at least the set I had)

Most gas/welding joints with do a change out much like propane. I went through a place on Martin Way by the dog pound.

If there is ONE thing I would stress above anything else is keeping those screw-on metal caps on the tanks at all times they aren't hooked to your torch and set in a cart. If one of those tanks tips without that cap and the valve ruptures, you've essentially have a Space Shuttle Challenger loose in your shop. ...And it will only aim for expensive schit.

--Oh that and wear clothes and boots you give fvck-zero about.