I shorted one of my chokes.
But it was all my doing from messing with it physically and having the SS bifilar wire both coming out the same hole, shorted at the point where they come out of the bobbin. Tried to dig it out, still think I can but I don't care because I got a couple more of them.
Have played with it and its all good as long as you don't over-screw it

, meaning a person could pulse wrong and have wrong loads on it that could cause an incorrect current draw into the transformer.
I still have not made anything for this transformer yet.
Although I did play with only a single isolated small tubeset, but after a while I really thought it was designed for another part in the system and not a tube-set. Did make some tiny bubblidge with it.
Besides that at the time I didn't even have a decent pulser setup.
Don't know what else I can tell you.
Never heard any problems from HardChrome either don't think he had any.
I'm also holding on to find out if these transformers were made for another part of the system.
Thinking pretty soon I'll set-up a ionizer its been on my mind for sometime now and seeing some of the simple methods has helped me decide.
Thanks to Bubz and Steve for that.
I'll try these transformers in an ionization experiment, for some reason I think they were designed for another HV device not a tube-set but air-gas processor sounds good or injector electrodes.