Mixy,
I just stumbled across this thread (and thus SCARM). Your work looks amazing, congrats and thanks. I am a not-very-happy user of RRtrack, so I am looking forward to giving SCARM a try. Two things:
1) Please add my vote to the "would love a Mac version" list.
2) Would you consider adding support for us Super-O users? Both of us would appreciate it. (Actually, the Yahoo Super-O group has almost 700 users). I would be glad to work with you to specify and verify the dimensions. Here are the basics:
Diameter: 36" on centers
Curve radius: 30 degrees (12 sections/circle)
Straight length: 9"
There are other bits and pieces (half-straight, half-curve, lockon and uncoupling sections, etc) that I would have to measure, but it is easy enough. Let me know if you are interested.
Thanks again. You seem to be attracting a vibrant user community, which is exciting.