There were a whole buncha secondary mechanical designs in this project. And if it were not for the help, observations and critiques of many others, this would not have turned out as elegantly as I expect it to be. It's been like "eating as elephant". ..one bite at a time. Also there has been several false starts where stuff didn't ,...or wouldn't work out. I wanted the header to "embrace" the top windshield frame in order that the crown did not add too much visual bulk. The section drawing indicates that goal. Further, after imagining the hinge on the bottom surface and finding there was no hardware, a friend sent me this "sewing machine hinge" which lead to the idea of hinging on the vertical surface. The hinges were brazed/soldered together and beat upon for an antique look. Note the coloring on the wood and other hardware parts to augment the car's color statement. The header is upside-down in this view and had some modeling done to make it look less like a big slab of wood. It took a fair amount of doodling to get the mechanism concept down to minimum number of parts. Especially to soft or attached parts that could be efficiently packaged. Refined from this cartoon, the strap that goes front to back, is now attached to the header and the Velcro loop is reversed at #1 bow and upon tensioning drives "stretcher #1a into the header receptacle.