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 :)