Custom Built Bridges

I built my first N scale model railroad layout in 1980. I operated it for about four years before selling it. Since then I've been building model railroad layouts in all sizes and scales. In the early nineties I started model bridge building. I got frustrated not being able to find prototypical looking movable model bridges (swing, bascule, vertical lift etc.) anywhere on the market. The obvious solution was to learn how to scratch build them myself. Thanks Mike