At the NFRM, all I needed my NG7 layout to do was run. The plan was to switch the train consisting of a Quarry Hunslet and two Peco coaches, on in the morning, and leave it. No fancy operation, just a bit of crowd-pleasing movent.
One problem with the scale is that you can't buy spare couplings. So, on the coaches, I've used some old, tension locks from OO models. They work, but the tight curves don't go well with thier hooks and the lovely Bachmann NG7 choppers. So, on the ends, I've taken them off.
Most of the time, this is fine, but every so often, the hook on the chopper would bounce up, and uncouple. Cue a paniky swithing off of the controller, if we spotted it. If not, the coaches ended up being pushed around to the front, where some helpful soul would try to sort things out. This didn't work well, as the loco would still be moving.
Anyway, I fixed the problem. Add a lump of Blu-Tack to the top of the chopper and it can't bounce. Problem solved for the entire show!
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