woodcraft makes solid sliders, solid has appx. 40% more coverage on the ground than hollow.
....1tail is the first in the country to have them inventory, they are relatively inexpensive as well.
the left side fairing will need to be cut, new shape.

second on what CBER said....also, go slow when holesawing plastic. you may need to use a utilility knife or dremel to clean up the hole at the end.