The sides of the footwell had been half covered by fibreglass cloth overlaps when the cockpit was 'glassed.
It remained for the footwell sole and the bottom half of the sides to be covered.
Again, it was easy to make a pattern and be sure that the 'glass panel would fit correctly.
I measured the footwell and made a scale drawing of the 'glass panel required to complete covering it, including overlaps where necessary.
Here is the drawing.
The measurements were transcribed onto a full size paper pattern which was then used to cut out a 'glass panel.
Here is the footwell after the panel had been installed and wetted out.
Every time I look at that footwell it seems just a bit too narrow for comfort, but it is what it is ...