Just tried the program to get the geometry right for an S curve I'm doing on our club layout. I'm too old to do it the old fashioned way with chord lengths, cosecants or whatever I might have used. The gray matter isn't what it used to be. The program works great. It didn't take too long to get the hang of it and Ace's posts on how to make "fitters" was excellent. Yes it is somewhat of an inconvenience to switch from O tubular to Atlas 3 rail but I consider that a small inconvenience for such a great program.
Thanks Mixy for the great work!
Don