(6.)And the same size bit was used for the pilot hole in the back of the bags where the much larger hole for the rubber grommets must be cut.
(7.)A rotary file is then used to open up the hole in the back of the bags. We could have used a larger drill bit, but when you use a large drill bit like that on fiberglass, you risk leaving a rough edge around the hole, because a large drill has a tendency to chip the smooth gelcoat.
(8.)The rubber grommet is then pushed through the new hole with the help of a small screwdriver.
(9.)The mounting pad for the bottom of the bag is less critical but necessary nonetheless. The hole that has to be drilled for it is marked with a Sharpie as well.
(10.)The holes are then drilled inside the channel in the bottom of the bag.
(11.)The rubber nubs from the bottom mounts are fed into the freshly drilled holes on the bottom of the bags.
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