Cut the remaining pieces for F3.
Online I saw a few posts from other builders about building a frame for gluing both F3 and F4. I found a piece of flat plywood with reinforced backing from a plywood shipping crate and made a frame from scraps of wood.
I cut a couple replacement frame pieces for the F3 and F4 because the 90 degree cuts didn't fit closely enough. I put them in the frame (dry) to see how they fit. Not bad. So I put them back in after mixing the T88 epoxy glue. This was my first time with the glue mix and probably made more glue than I needed. I used small 4 oz. dixie cups and wood popsicle sticks to stir. The garage temperature is within the range recommended for the glue (50? +). I put the piece of the douglas fir and sitka spruce in the frame. I cut the �nch ply for the covering pieces on the bandsaw and perhaps will glue those tomorrow.