I'm sure a lot of us have this problem, so I'm wondering if anyone has any good solutions. I've had to take my upper door panels off quite a few times, and the stiff cardboard (?) with holes for the fir trees has become feeble and torn in some places. I've hit upon a system where i use a few pieces of scotch tape to hold the fir trees in the right place so that i can get the door panels on, but the tape seems to give way and leave parts of the panel disconnected from the door. Does anyone know of any way to reinforce the door panel so that the fir trees can be held firmly in place once again? -Christian