Hi Grant,
The outer frame is f/glass from DRB - designed to fully replace the various versions of MK1 & II perspex windows. I can pop out my setup & replace it with a full perspex set if required.
The frames of the quarter window & the hinged main window are aluminium c-channel - bent & formed to size by DRB. All I had to do was to cut & shape a standard full perspex window to fit the 2 frames (easier said than done). The cut-down perspex panels were then fitted into the aly frames & sealed in with silicone.
I'll try to get some more close-up pics done over the w/e & post them.
Kind Regards,
Peter D.