[cmperry4]

I do have a hatch, but it is for my C8A project, currently in pieces. I could photo and measure the parts for you if you are thinking of replicating. There are six main pieces: A flat retainer ring with countersunk holes for inside the cab, the main vertical ring, which has the horizontal flange to match the retainer ring. Then the three pads, canvas covered horsehair stuffed, glued to curved metal strips to match the inner face of the ring. The wood bit is a tapered spacer hoop that levels the ring over the slope of the roof. There is also a metal retainer strip on the rear of the ring to hold the canvas cover. Various flathead screws are involved, of graduated lengths for the main ring, and those which hold the pads to the main ring.