Marine Speaker Filler Panel

I'm adding waterproof marine speakers to my boat. I had cut a larger hole to access removing old carpet from inside the boat hull. Afterward, it left great holes to add speakers for my stereo/gps/bluetooth system, but the speakers were too small.
These filler panels will allow me to mount the speakers to these panels, and then mount the assembly to fill the large holes that I had cut in the interior fiberglass panels of the boat.
The smallest diameter is 5-1/8", a perfect fit for the speakers.
I will come back and edit this "thing" with the exact speakers that I'm using.

Print Settings

Printer:

Sovol SV03

Rafts:

No

No

Resolution:

.60

100

Filament: PolyMaker PLA Gold

Notes:

Tried printing with Cura, but it came out awful. Used basically the same settings in PrusaSlicer, and it came out perfect. Not sure what the difference was.
Speed 50mm, Temp 180, Bed 60