I had a intake duct liner detach from the fuse intake upon test run. My solution that has worked better than I expected on previous intakes, is to take fiberglass seam tape and put small roles between the intake and fuse. It not only supports the ducting, but also has the ability to avoid breaking away in case of shock. It also adds additional support to the fuse with out distorting it. It is also very light. And a layer of glass on the outside lower lip.

The other thing that the "Yellowaircraft" rcu member pointed out is that the top ducting liner can also detach so, I put a lightweight kevlar seam cap on that one.

I also made a transitional ducting from BVM intake to dynemax. My adapter is made to have a mated connection to stop the duct from getting sucked into the blades and have the duct go inside the dynemax and avoid the step and hard short angle change right before the fan blades as you would have if you put the ducting outside of the dyenemax fan shroud.

Steve