I have Bachmann ROD 3023 fitted with 36557 decoder .... runs fine. I have also just fitted Gaugemaster DCC22 decoder to Hornby 9F , hard wired. The 9F also has modification with Mashima motor and flywheel, runs fine. Problem is that when the ROD is in the vicinity of the 9F, then it edges forward like a ticking clock even with no power applied ( to either loco ). Is this interference ? Can anybody assist with their input, please ? Both decoders are currently with default settings.