... DMU platform in the bottom left is probably in the fixed category. Also we have to steer clear of the hinged board joint, and preferably cross it only at a right angle. In P4 crossing a board joint at a skew angle requires some precision carpentry to avoid misalignments. A slight gap between the boards (due to an uneven floor perhaps) can be crossed square, but not at an angle. The first idea is to replace the slip road with a separate crossover, using a tandem turnout in the main: fremington1.png Pros: Maintains the existing run-round length. Tracks cross the joint square. Clear length in the platform road is increased a little while using the main road to head spur. Cons: The head spur for running round is very short, only about 12" clear. Just room for a loco only. The design looks cramped and more typical of an inner-city terminus than out in the sticks. In the second idea I moved the turnout to the other side of the board joint: fremington2.png Pros: ...