so looks like the rear frame had some rust and bad-installer damage. the outrigger pieces hold the shells weight so need to be somewhat integral. i cut out 2 damaged ones, replaced 2, and added 2 more in the back.
one of the new outriggers in the back.
this one the center stringer was “torn” loose at the top weld. not exactly a quality job, but re-welded enough to BE STIFF.
replaced, repaired, modified, bones DONE !!!
now just need some cash for more plywood :)