[Dekatron]

I can answer/comment on two of your questions/comments.

The bridge rectifiers I use are made by Vishay and are from the 2KBP-series.

You can cut off the pins on rotary switches with solder lugs but I have destroyed two switches that way, the pins got lose internally and it was not possible to get good contact later, the pins will also be a lot shorter and that might affect the plastic when soldering them, melting the plastic.

I can’t really comment on the reservoir capacitors but I think it is a small cost of ordering one extra.