... D-12/ C-12 crossover in that board. See below. By changing to generic V-crossings the minimum radius on the crossover road is 68.5" -- not quite the 72" you are looking for, but with a bit of gauge-widening it would probably be ok. For curved crossovers you can usually go down one switch size on the inner turnout. If you want a much longer crossover you could move the inner switch to the next board and put the board joint through the turnout. 2_020531_380000000.png Impressive looking layout for 0 gauge. p.s. I don't understand your comment about a switched frog? regards, Martin. posted: 2 Mar 2010 12:14 from: Jamie92208 Thanks for that very helpful reply Martin. That looks fine. As most of the crossing moves will be by 3 car emu's the marginally reduced radius should be fine. I didn't want it to go onto the next board as the scenic break is at that joint. The crossover is to help make more interest in an area where I can't ...