Hi All,
So the ultimate take-away is that I should suffer what I know and not try to eliminate and suffering...:(
I tried moving to work only with project libraries, because my ancient/bloated SMW library was causing 'eternal' SMW start times and open project times...well that definitely fixed that issue, but the when it came to development and trying to retrieve previously created User modules that had other user modules and S+ embedded in them, it was just way too much of a beating to be worth it, so I've gone back to the devil I know...

Of course now I have a new problem, that I never had before all this rigmarole, that I'd like to see if anyone has seen:
Some User Modules will not show up in 4-series, and when opening a project with said module, the module is commented out and not visible to re-add in the SMW library. - Thus making the project unusable without some sort of resolution to this issue...:(

*** I understand about Project Header/Target Control Classes, even for sub modules and S+ ***

I worked thru one issue with Crestron Support last week and found that there was an S+ module that, although was set to 3/4-series and was re-Built/Save+Compile, we had to do an S+ 'Recompile ALL' to get it to work.
So when I ran into a similar issue yesterday, I dutifully checked all the internal item settings and did a recompile all on the (1) S+ module in the User Module.
Still Nothing!!!

Has anyone seen anything like this? or have any other secret hand-shakes??

TIA!!