I fit the cardboard tight to the window opening and I will cut the Polycorbonate --Manually Fix-- Polycarbonate Carbonate Bicarbonate Pollinate Polygonal the same size. This will give me a little extra so I can leave a 1/8" gap all the way around the Polycorbonate --Manually Fix-- Polycarbonate Carbonate Bicarbonate Pollinate Polygonal for flex. One last thing to add I welded a 1/2: X 1/2" box tube in the center of the windsheild --Manually Fix-- windshield windshields windshield's windchill to support the Polycarbonate during high speed.
I transferred the paper pattern to cardboard so I could refit the cardboard to the window opening and make sure it fit well. I cut the cardboard 1/8" bigger on all sides and trimmed back for perfect fit. Where I had gaps I cut a small piece of cardboard the size of the gap and tapped it in the gap. I used a razor knife to cut the cardboard along the paper pattern.
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