Too bad Tom, wished we would have spoken earlier. Depending on how you glued the teflon tubes in place, I can see where this could be a problem. The teflon used is thin and flimsy, and will collapse a little as the glue cures. I suspect that's what happened in your case

This system is easy to do if you take a pair of carbon rods from CST Sales cat #T515-4, make your ladder setup from these and install it. Theyare carbon hollow rods with a .116" ID. The teflon guider tubes will slip fit inside these, and will just float inside the carbon tubes. No need for any binder material other than front and back, just to keep the teflon tube from sliding around.

The teflon tube can be installed after the plane is done, with the carbon rod or a steel rod for support while inserting the tube. Then complete the deps setup normally.

There is variety of carbon tubes available at CST. Resist the temptation to get the smaller carbon tube that will just fit the solid carbon rod. In a high vibration environment, carbon against carbon will wear the system out prematurely. Definitely use the teflon tubing because Teflon is soft and will absorb alot of the punishment, yet slippery enough to never cause any problem. This set-up will weigh in at around 40 grams or less depending on how long one makes the carbon tubes and how crazy one gets with the ladder.

MattK