Just recently completed this.
Made up of parts from several 4x5's:
Peter Gowland rail and focusing.
Front standard from old Speed Graphic
Bellows from Crown Graphic
Ground glass from Calumet (Cambo?)
Ground glass assembly with springs from B&J Press
Rear standard from old Arca-Swiss 4x5 to 8x10 adapter.
Camera weighs 2 lbs 2 oz without lens board.
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