Latest Purchase - Not Quite Advance :)

[Super]

I figured that since the wheels would be almost constantly striking the button it would keep gates up until the wheels passed. The trick would be to find the button that that was the exact proper height to just protrud slightly through the bottom of the track where the wheels would strike it but not so high as to make the train bounce over it like in that video but they have many different heights I believe.

That welder card is pretty cool and would look good I bet inside a maintenance building or the like. Too bad they don't link to a video.