John and everyone,
Are you using anything special to protect your trains?
I last bought the bag of diodes from Mouser in 2000 , however I think I found the right part: https://www.mouser.com/Product...jLZ6j4EQ5nBpTQ%3D%3D
Using the part # I found this on digikeys site: https://www.digikey.com/produc...179ee36dbba38034f216
Given that the voltage protection circuits in the TIU don't last and neither do the add-on diodes and that manufacturer's warranties are only a year, I think this is a good idea. Are the ones above good ones to use or what do you recommend? If I find them, I guess I'll replace them annually like suggested above.