Ken and all ,if you look at my pic in post #14 you can see F3 and F4 set wing incidence I double and triple checked measurements
I am going to glue F16 with wire in it to F15 and let bottom be short end of stick yes I agree F16 is short by plan drawing but I tack glued F16 on to F15 just to ck fit it seems to work.
It's my guess F3 & F4 come out after complete frame up of fuse.
I tack glued them in and after completing fuse and glassing inner wing saddle area will cut them out.
If I appear to be wrong on any of this Please let me know.
Thanks Jeff