Unfortunately this is just too true. I take part in a professional fireworks forum sometimes, and if you offer anything remotely useful or ask a question even slightly interesting you get flames to hell. I just don't get it.

Another option with this problem is to use a 12v DC too 110v 60 Hz AC setup up transformer (wrong term I think). I was going to do this with mine, but then I figured out the arm had slipped around at some point of it's 50 year life, adjusting it back just a few degrees solved the problem and it still works today.

Cheers

Cris