The set came back from the tech and the test roll is being finished. I hope to post results if they come out.
I can confirm that the leaf shutter is part of the body, as well as the aperture mechanism. No glass in the body; it is all in the lenses.
Regarding weight - took the Selectaflex to a digital kitchen scale. Weight of the Selectaflex body with Solinar lens read 1088 g; the body alone, 886 g. For a comparison, my Nikon F2 with Photomic prism and 50/1.4 hit the scale at 1148 g; body and prism, without lens, were 846 g.