I'm finally biting the bullet on layout #3 and selling off all the EZ Track (I really love those 35" radius curves!) and going with all flextrack. I've never been able to lay curved flextrack without derailment-prone kinks in the joints, so any advice about that is beaucoup welcome. I'm also trying out foam board instead of plywood or hardboard. Now I just need advice about methods for attaching the cork roadbed to the foam board, and then attaching the track to the cork -- keeping in mind that I expect to change aspects of the track work if I discover something that doesn't work like I thought it would on paper. I did have a brainstorm about how to lay out the curves accurately: use the EZ Track like a template (doh!) Thanks for any and all your thoughts!