Continuing on with my experimental coaxial driver: GRS 8PT-8 and a ND28F with the mounting flange trimmed off.
I previously trimmed down the gasket foam roughly flush with the steel frame outer lip. But it was not even, nor pretty. If I try a flush recess mount I wanted to see about cleaning that up. I came up with the idea of using some 1/8" kydex that I have leftover to make a trim ring. (replacing the foam)
I started out peeling off the foam gasket. The “glue” is pretty tough. But fortunately it is slightly soft like contact cement instead of hard like an epoxy. So a pocket knife is able to coax alot of it to let go with some elbow grease. Not perfect, but flat enough to glue something else over it.
Marked and drilled recesses for the screw heads.
Then used a circle jig to trim the OD and ID
Needed some trimming with a box cutter to fine tune the size.
if I muster the effort to try crossing the woofer around 250hz.