Hatch Rings

I'd been debating how to do my hatches for awhile.  I knew I wanted the fit to be nice, and I didn't want to have to recreate lids, rather using the cutoffs for this purpose.  For the hatch rings, I figured out how to cut G10 on the home-made CNC setup.  With such a low power router and lightweight gantry, it takes many shallow passes, but it's possible with patience.  G10 was sourced from McMaster Carr.