I am DONE! 
I started my Great-Calibre-Check-and-Reconvert-as-Needed project kind of by accident on August 19th. So it has taken me just shy of 4 months, with the last 6 to 7 weeks using almost all of normal reading/watching TV/etc time on it. And I am FINALLY done!
I replaced/fixed cropping covers as needed, fixed formatting, removed unwanted front and back matter (excerpts, ads, etc), corrected/reformatted blurbs, fixed Table of Contents.
Now I have added all the books in my main library and the unread books from my vault library back on my Sony. And added an assortment of books (a portion of my favorites and TBR pile) to my Kobo mini. Plus I just added nearly all of my books to my Nexus via Calibre Companion (so fast compared to my Sony - LOL).
I HAVE to get some cleaning and chores done tomorrow because my house is a mess
but then it's reading time.
Quick question for those using Calibre Companion, is there a way to make the series display in order when you choose "Series" from the groups but still have Title and Authors sort alphabetically when you choose them? Or do you have to choose the sort method manually each time?