Reinhard "Ben" Beneke: "This would have been the coolest part for 9V track....." Mark Chittenden: "Good idea for those places where a standard curve track wont fit/work." Mike McKee: "It IS flexible. The design causes chatter as the wheel deflects off the outside rail at the joint. Aesthetics don't bothe me (but I am not a huge dezign realist). Too bad it's not 9V."