23-Jan-08 Cutting the mounting boss on the brake cylinder using the angle-plate and c-clamp setup. The finished height of the boss was based on the centerline of the cylinder. now how it is possible to clamp it and measure the centerline at the same time?? It seemed like a simple set up - make the inside of the cylinder the same height as the top of the angle-plate and calculate the height from there. The alternative was to turn a close-fitting boss mounted on the angle-plate, indicate the centerline of the boss, then press and clamp the cylinder onto the boss. A bunch more work the second way.