I did something similar to John’s work on the 0-6-0. I had an 0-8-0 that only had 2 rollers on the tender. The first runs featured 2 on the engine and one on the tender. As does the latest release. Not sure what they were thinking during the middle run. Bought the rollers and what was needed for the install. I guess this was a benefit of running Kadee’s I didn’t realize when I installed them. When it came time to install the rollers. The wire was already their to use to tie them together that went to the front coupler.
BobbyD, I’ve had to on a few Lionel locos that I tied the chassis’ together. Most of my engines are small and easy to handle. So I opted to just use a piece of super flex wire with a ring at each end. I had a Legacy Consolidation that would only stall on a Ross 3 way. Did my usual hookup and it still stalled. After scratching my head a bit. I attached the ring to the metal chassis using a screw for the shell. After checking with a meter. The chassis isn’t grounded. Placed it on the tender truck which features an axle wiper and all was well.
