|Wheel Well Swoosh
Many times we see the original wheel well swoosh has been cut larger. This is typically because a previous owner did not know to jack up BOTH sides when changing a tire. With the torsion spring axles used by Serro, that is necessary to get the wheels to drop enough to remove (or replace) them.
Many thanks to Wes Cray for the excellent drawing which you can use to recreate yours.