I don’t like the rubber grommet that covers the access hole to the valve. It’s annoying to install and has a black color which cannot be painted in a matching color. Custom made covers were designed and fabricated.
Access to the valve through the hole is not super easy, but with some practice and a 90 degrees adapter it’s doable:
CAD design of the cover plate, installing will be done with just 1 M4x12 mm bolt:
The cutout is for the internal shape of the main wheel spats near the bolt:
Plenty of room to hold the backing plate in place with one hand:
CAM and paint ready (on the left side the ugly rubber grommet):