This is where I got to tinkering with it. I have all the track for it so I will probably give it a go to see how much clearance there is and adjust it a bit accordingly. The idea is just to have something fairly small, with a decent run from station to station (e.g. station -> outer loop -> inner loop -> station) - obviously that can be a bit limiting for multiple running but I've added some more points for the inner section so there's a pair of out-and-back routes. Who knows, it might be terrible but it's just a little introduction to N gauge for now, in a small space.