The larger screws make the most sense. Use stainless steel screws. I would buy several sizes to see which fits the best and holds tight.
I'm not a big fan of trying to center a hole as you drill through epoxy. Most of the time it will just break away or force your drill offline. Using a baby powder mix of epoxy would help this, but now we're getting into a big project and possible a mess on the floor.
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"At some point, throwing money at the problem *is* the right answer", Uncle Bob
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Tom & Doty
2019 Airstream Classic 30 Twin
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