Well I have to say that you folks have been more than helpful with the questions that I have asked. Thank you. But I have another question that I am trying hard not to make your eyes roll back with what seems like it should be rather obvious. I am trying to construct two sections of track one a circle, 19 or 20 inches, and the other a oval that is about (or just under 24"X36" - I would like my display to be on a 24"X36" board). Now as I shop for track, I see "17 1/2 full curve (6)" Does this mean that with all 6 pieces it will total 17 1/2" inches and be a full curve - ie 90 degrees (or is a full curve 180)? I suspect that it is 90 degrees so therefore to make a circle I will need four packs of these 6 pieces to make a circle 35"? Am I heading anywhere near the right direction? How do I know what track to buy?