I thought I'd put on here some other projects, past & present that have diverted me from my G3 interests.
An associate at our club who works for the real railway was contructing an N gauge version of Staythorpe Level Crossing, Nottinghamshire.
So I volunteered
to come up with a mechanism for the single pair of gates.
So out comes the stash of Meccano gears, some 3/16" silver steel, a couple of axle bearings, a bit of brass angle, some PC board, a geared motor, a couple of microswitches and a few bits of wire - and a DPDT switch.
And it works