OP

Quoted from BCpinhead:

Wood glue eh?
Thanks Steve. That really jives with what I was trying to figure out. The order or sequence in which to go about the fixes. Makes sense to set up the frame where needed, glue and clamp w screws as needed. Let dry. Then tackle new corner blocks.
I'd never be able to track down 3M specialty products out here in booney-ville (but it's all good), plus you need a special gun to apply them , those 2 part ones anyways but thanks for suggesting them...I'm sure they wood be absolutely bomber as adhesive.
So wood glue and a few screws it is. Definitely need some predrilling too. Regarding the main cabinet, I was thinking of making or getting some thin alum plates to use as "backing plates" to glue on the 45 corner pieces that the legs bolt into -on mine the narrow steel threaded plates are very bent (I'll straighten them) but they have been reefed on over the years and therefore cracked 2 of the 45 wood corner brace pieces in 1/2. If I have to use a nut on very inside so be it. (The alum plates would be drilled to accommodate the leg bolts.). The cab is pretty straight and actually not loose like the backbox so really don't want to take the cracked 45s out....i know this is a short cut but ... I can feel some frowns out there... I plead the time management defence.
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Oh yea, and bondo....why is everyone using bondo? no one uses plastic wood filler? I bought a can of plastic wood filler but maybe it is not the best to use. I can source bondo tho living in the winter salt-belt. Lol...