As far as I can tell the water is not running down the fabric inside the hood so is probably not due to the stitching. One test I did was to fit my storm cover so the lower part of the hood, where the brake lights are, was exposed and it still leaked.. It could be coming in through the brake light, that is the right sort of area but when Oakmere first looked at this issue they thought it was the brake light and said they re-sealed it but the leak persisted.
Roger
CX Plus Four 2021