Hello. I'm looking to get away from the glass carboys I have, and move over to fermenting in a 7 gal plastic bucket (Like Clawhammer supply does). I see lots of mod videos/instructions online for adding a grommet to the lid for a bubbler airlock. I don't have any of those anymore. I made the switch to breathable silicone stoppers a long time ago, and don't ever want to go back. So my question is whether or not I can just drill a hole in the lid, sand it down, and insert a breathable silicone stopper. Will it be airtight? Or am I dreaming?