Originally Posted by Doboy Dawg
The screws will come out easy with a cordless drill or impact driver. Mine used the square head screw bit. They're self tapping sheet metal screws easily replaced.
Didn't get to finish my post, had to answer a call.
In my Jayfeather the heater ducts that traverse the underbelly are cheap flex duct, like a clothes dryer hookup. The ducts that where laying in the middle, where there was a slight downward bow, the spiral wire in the flex duct had rusted and broke though the duct. I had several holes in the ducts. This is from water that will find a way in the liner and pool in the center of the liner causing the downward bow, because there is no drain holes in the liner. I used aluminum duct tape to repair the ducts, since the holes were small.
On my trailer I installed a couple of extra cross bars of 1" angle and I placed a thin sheet metal strip across the joint I cut in the liner.