Skipdup posted:So, I woke up this AM thinking about this. The two plans are identical, except for a small straight section on the return loops. The variance between the 2 programs comes down to AnyRail calling for 3 pieces (one 4.5" and two 1.37" totaling 7.26") and SCARM calling for 4 pieces (four 1.75" totaling 7").
SCARM measures the actual gap at (approximately???) 7.1". I'm not sure how to measure a gap in AnyRail.
When building, I'm going to try and remember to experiment with both and see which one is more "right"... Maybe they're both right???
Good analysis Skip! My construction confirms your analysis/experiments. So that implies that one (or as you say, perhaps both) are off on their straight sections.
AnyRail has a nice ruler object that you can place and stretch to measure precisely. It stays in place, and does not snap back like the tape measure.