Ihave several proto 1000 rs-2s which I've added mrc decoders to,none of them run right always stopping and starting. I've used the same decoder in athearn, atlas, with no troubles at all. Also have operated them on other peoples and club layouts with digitrax, and other ststems with the same results. Fitting athearn bushings and nwsl wheels seem to help some but not enough. These engines were among my best runners in dc. What's up? Bad contact compared to other models that only shows up with dirt finnicky dcc?