GG's

Lots of nice ideas here! Thank you, all!

The "nose down into the eves" configuration works except where the space has
"knee walls"

The basic configuration is starting to jell.  It will be a bit less than 14
inches wide to nestle between two rafters.  It will be a box with an open
bottom. The upper end will have slots to insert the blades.  The toe ends will
be held parallel by a kerfed crosspiece athwart the open bottom.  Perhaps
multiple kerfed crosspieces so that shorter saws can be supported.

I want an airspace between the top of the box and the underside of the
uninsulated roof sheathing.

John Ruth
Thinking back to the short panel saw with which his father introduced him to
woodworking, and wishing he hadn't kinked it in a moment of juvenile
carelessness.  Also wishing he hadn't left it behind when he tearfully cleared
out his father's workshop.