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Old 9th August 2019
Here for the gear

I guess I just figured the smallest possible hole would be best and easiest to make air tight. I'm not necessarily confident in constructing an access hatch from scratch that will be air tight. If I just glue the circle of drywall - I'll need to remove from the wall to insert the fitting - into the lid of the fitting, mass should match up pretty well, right? I can even back that with a circle of roxul. It'll match the layering of the wall almost perfectly.