Hello to anyone watching.
Has anyone thought about making a fibreglass
one piece rear panel and wings. I have and made
a success of it. The moulding tucks under the rear
low chassis rail and held in place with 3 m6 screws.
The front edge of the wings are held in place, one at
lower edge into the side panel, the other a little higher
into the triangular plate in the chassis, the holes for the
screws are m6 rivnuts. Just thought I would share.

Sounds similar to the JPSC striker 1 piece that I have.

It does not quite tuck all the way forward to the lower rail, but it's not far off. Arches and tube are single piece.