I once had a look at it and decided all you need to fix the problem is a bit of fibre optic cable. It gets the runner up prize. The winner is the 45 viewfinder from Seacam . The point of an SLR housing is that you can see the image exactly as it will be on film. Serious photographers have always valued being able to see the viewfinder image properly.
Much controversy surrounds viewfinder optics.
The panel saw a cutaway section of this incredible piece of optical engineering. It employs several lenses to create an amazing optical system with virtually no loss of light. The Aquatica 8008 housing from that era was big and boxy by comparison. Indeed, it was a close run race. The Aquatica 90 is also a fabulous housing.