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vacuum bagging is way too complicated for my possibilities (no workspace, work either deep in the night in the garage or in my 1 room appartment).
The strength of glass is unfortunately not sufficient in this application. As the fork clearly shows. The only alternative might be a well thought construction of (european!!!) birch plywood, which has about half the strength of glass laminate but a third of the density, so a sufficiently strong construction will be more lightweight.
(The parameters of concern here are Young's modulus and density)
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