So, a question. Re-reading Stan2004's "nerdy" but very helpful math, why not take the capacitor size up to 1000, 2200 or even 3300 uF? Not terribly expensive, and it increases the hold times by multiples. Solving a problem with a sledge hammer? Or will I burn down the house?
I do realize that there may be better pin mounted relay options as suggested by GRJohn but I am intimidated by PCB, perfboard, etc. Conceptually I get the benefits but it's another learning curve (I want to run my trains!) and I think old fashion sockets with screw terminals eases future reuse of the relays (I have broken down and rebuilt my layout twice in 15 years, and will likely do so again).
As always, thanks all
