This week I have been mostly devising uncoupling systems..... I like Microtrains knuckle couplers which I use on the outer ends of cuts of wagons (or even complete trains). In between I use whatever suits best which includes Kato non-automatic knuckles which are very small and unobtrusive and, on one set of 16T mineral wagons, DG because it's difficult to make anything else fit.
Microtrains use permanent magnets for coupling and uncoupling, but the magnets they sell are huge and can only be installed on straight track. I need to shunt trip workings in and out of a siding and colliery branch which are on a curve. So I began mucking around with small rare earth magnets. I found that 2mm diameter ones with a pull of 0.9kg (1lb in old money) work well. I used cyano to stick them in a row to a piece of microstrip. The sleepers were cut through and a section removed to take each strip and the strip fixed with two-part rapid epoxy. The picture shows the result. It all still needs painting and ballasting but I think that when complete it should be virtually unnoticeable. The Mictrotrains magnet is shown for comparison.