"Michael Roback" wrote
Any help or advise would be appreciated.
Thanks.

No help here, but how did you get talked into being a guinea pig?

Plywood system with fir joists sounds like a very poor choice for a decking
system. I know it's used for roof systems, but it's easy to tell when a
roof is leaking. Unless there's room to walk under your deck, you would
never know it's leaking until you feel the soft spot while walking it.

I wouldn't throw good money at a lost cause. Just my opinion.