Hi all
Some progress, slowed by stuffing my Arrow Tiger at the week end, finger trouble too slow and too low, minimal time to repair, intermediate bulkhead and tank floor only.

Pics show ribs cut out with doublers and treberlers? prior to installation.
Second pic shows them in place but not glued prior to final shaping, so don't be too critical, note slot for aileron lead and floor installed for wheel whell, more pics soon.