can/has it been done?? home made headliner...

I move those relief Cuts back to where they should be which should make this thing stop fighting me so hard. It was trying to make the side flaps kind of Warp. I taped it really really good on the back side, but I just put very little tape on the finished side because I want to leave as much surface room of wood for gluing on a material if such a time comes.
20171119_123457.jpg 20171119_123457.jpg 20171119_123525.jpg opps doubled the first pic....