How do you glue these back on?

Second part was to fashion the missing lip out of polycarbonate. I only had 1/16" and the lip was 1/8" thick so i glued 2 pieces of polycarbonate together with MEK, clamped thrm together and let dry, then shaped the new piece to fit and installed w JB Weld. Notice it is not filed to final shape on the ends yet, but it basically a trapezoidal block at this time.

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