Thanks Kent, and everyone else that replied with data and knowledge on this subject:
I have collated the following data from the RigRite dot com web site and the Goiot-Systems dot com web sites: Please chime-in if something doesn't fit with what you are seeing on your boat (I am off the boat for a month or so, so will depend on you all to confirm the dimensions etc.)
Forward Cabin and Saloon Hatches: Goiot Tradition Model (group as Goiot calls them) Size 50.50, Code 121155, weight 8.0 kg, cutout dimension 500 x 500 mm, overall dimension 582 x 554 mm, Acrylic thickness 10 mm, lid height 46 mm, lens size 506 x 506 mm. RigRite Part numbers: Blue tinted Lens part number Goi 101176, Fly screen Goi 93468, Gasket Goi HT-GS.
Forward Head Hatch: Goiot Tradition Model, Size 50.37, Code 121154, weight 6.7 kg, cutout dimension 500 x 370 mm, overall dimension 554 x 451 mm, Acrylic thickness 10 mm, lid height 46 mm, lens size 506 x 376 mm. RigRite Part numbers: Blue tinted Lens part number Goi 101175, Fly screen Goi 93464, Gasket Goi HT-GS.
Aft Cabin Hatch: Goiot Cristal Model, Size T-50 size, Model 49.36, Code 115753, Overall dimension 559 x 452 mm, height 28 mm. Acrylic thickness 10 mm. Lens size is 478 x 348 mm. RigRite Part numbers: Blue tinted Lens part number is Goi100920, Fly screen is Goi 101651X, Gasket Goi HC-GL.
Thanks for all the help and expertise. Per Joel's and Kent's suggestion I think I will just use an orbital sander to to opacify the lenses on the forward two hatches as opposed to applying a film.
Gary S. Silver
Amel SM 2000 #335 lying Puerto Del Rey Marina slip 1258, Puerto Rico