Thanks for any input. I have read and learned alot about upholstery on here. To give you an idea of what I'm attempting, here are my frame horn test inserts. They're fixed to luan backing with snaps. I need to redo them with thicker foam to get the rolls to look right. Here's what I want to make. It's motor mount inserts. I cant fix em to luan because they're sortof reverse boxed, and luan would be too thick. I want the edges to look nice and crisp, but when I attepted to make em it didn't go well . Here's a sketch of what I was attempting: I want them to sit inside of the motor mount but under the bolts that go to the engine and frame. Here are the motor mounts on the engine: How would you make this? Tips? Suggestions? Thank you!!