A double loop round the games room, 27' x 17', double track most of the way with a couple of quadrupled sections for passing and holding trains. The 8F can /just/ climb the steepest incline, 1:40, pulling a train of about 400 2" oval brads equally distributed among 24 trucks, and the points are all flat enough that a well assembled train will run over them without any derailments. Six control sockets for the DCC handsets, a couple more needed, and some of the sidings operational as well, including the turntable.
Importantly, the lifting bridge and the trundleduct work flawlessly, and the points on the trundleduct (which were a compromise forced by circumstance) actually do work.
The execrable tender-drive Hornby Flying Scotsman also runs round without derailing, but can't take much in the way of switching (this is normal for the model). N2 runs perfectly and so does the DMU so I am pretty confident that the trackwork is all flat, the transitions smooth enough and the power supplied without excessive volt drop. It's taken at least a year and a half since I started in earnest, the points are not yet powered and there is no scenic down yet, but the loop is closed and....
WE CAN PLAY TRAINS!
Which is all we care about!
So I have two happy boys and a moderately happy me. Time for a celebratory pint, I think.