I have a few questions as I'm doing an ERR install on the same locomotive now.
1. To have 4 chuffs/revolution, do I need to have 4 magnets? I assume that's why you spaced them 90 degress apart.
2. I'm mounting the magnets to the same driver as you. They won't hold magnetically to the wheel.. Did you have the same problem? I was going to super glue them in.
Thanks!