I posted here a while back about making your own 54" wide radius curves like the K-Line type, now discontinued... I had some extra time tonight and tried a little experiment making my own. It was fairly easy.. I dis-assembled some original flyer track, created the correct radius on the basement floor, and bent the rails, one at a time.. A better way would be the create a jig from some 1/2" plywood to make the bending more exact, but my hand-bending seemed to work very well. The newly bent curves are not as long as the original K-Line track, but I think they should work in a pinch. If you want more ties, just take them from a junk piece of track. You can see the difference in the radius from the following pictures.. Gauging is still correct..It's a little labor-intensive but for the first try, completely worth it, in my opinion.