Greetings:  Nealy 1/2 inch (8.5 mm) of light leaking space on each side of the goggles when firmly secured on the face as instructed. Aside from duct taping the goggles to my face, anyone suggestions, on how to close the 'gap', as it were? Are other faceplates available to compensate for heads that don't fit?  Thanks in advance.

I have the same issue.  Look forward too seeing if anyone has a good option.  I wear a big hoodie when flying the drone and it seems to help.

I don't know if you got an answer in the meanwhile, for me this worked!

https://mavicpilots.com/threads/light-leaks-anyone.18360/

https://www.racedayquads.com/products/dji-goggle-shims-3d-printed-tpu-black

Same for me. Fit and comfort is terrible.
https://www.racedayquads.com/products/dji-goggle-shims-3d-printed-tpu-black

DJI has released a new Rubber replacement that is meant to fix this issue. But its out of stock.