Tested box layout. May need to reprint the white body piece with the OLED cutout slightly lower.
Attached rubber feet to bottom.
Tested various Ferric Chloride etch-resist options on a scrap piece of copper clad.
The finest and best solution is multiple coats/layers of the Ultra Fine Sharpie, or masking tape for large rectangular areas.
Used these solutions to repair minor issues in the toner-transferred copper mask.
Etched away the copper to reveal the traces.
