I'm sure this has been asked before and I have tryed searching with not much luck. Ok, I'm lousy at searches, but I know somebody must have a quick answer. I'm in the middle of designing my new layout with Atlas RTS-8 and I'm trying to remember what a good parallel spacing is for Code 55. RTS keeps defaulting to 3.6. I will be going to go through some portals and the last time I did this, I had to shave the inside off the portal because it was close to a bend and the ends of my passenger cars were clipping the edge of the portal. I can't get away from this problem because I can't move the bend. I do want the spacing consistent through out the layout and don't want it look weird. I also have a double crossover using #10 switches and I don't know if there will be any problems with that. 1st time using #10s. I think I had about 1-5/16" on my last layout. Is that too close?