This past weekend I was able to get the correct plug on my new welder, and use it for the first time. After a half hour setting up, and fifteen more minutes of fiddling, I found the correct settings and fired up the new arc-welder.
I didn't have a lot of time, so I contented myself with fusing a pair of horse shoes together.
Whereupon I went to use my acetylene torch (also for the first time). When I swapped my brand new acetylene tank for a full tank, it had a plastic cap covering the output nozzle, which was great because I wasn't planning on assembling it for a while.
I remove the cap, ready to go cut some pipe for a quick project for Papa, and Lo! The inside of the nozzle was caked in crud. So, sadly, as I had little time remaining in the day, I was unable to use it at the time.
Oh well. One down, one to go.