I completed some nice upgrades to the coils power supply for safety and quality.
I added DIN rail terminal blocks and rearranged the parts to emphasize discharge path:
Added an internal variac:
Added terminal blocks to the trigger board:
These pins on the SCR never soldered well because they are mini-fastons. Fixed:
For safety, I added an AC switch:
I replaced the trigger’s battery with a 9V wall wart:
And added a DIN rail 0.5 A circuit breaker: