My first new project for 2014! I decided to fix the west portal of the fourth tunnel once and for all. I hadn’t been happy with how it had turned out – the portal itself was pretty good and fairly on-spec, but the scenery was.. off. The prototype has changed considerably as slides have wiped out a small part of the roadbed, so getting it right is tricky. But basically I knew I needed to shave the mountain down a bit, change the curve of the mountain (as much as possible – the track that exits from tunnel 4 only has a short distance before it must make a sharp curve near the corner of the room). I’m happier with how it looks now. And I decided while I was at it to sleeve the inside of it. About a hundred feet (I think of the inside of the tunnel has been sleeved with concrete. I used a piece of styrene, rolled it, slid it into the tunnel, let it unfurl itself, and attached it to the portal. Only the first 40 feet or so in scale, but enough that if a really tall visitor looks, they’ll see what looks like a concrete wall instead of rock in there, as it should be.