I installed grommets in an old tramp but I went through the sides where the heat welded strip is before the mesh. Sailrite supplied me with the tools and hardware. I intalled them off the boat and the whole thing worked great. In your case I would install them off the boat and reinforce them with more tramp material above and below. You'll need to stitch them or glue them or both before installing the grommets.
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Capt. Han
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