Finally got the solar panels mounted!
I figured out why I couldn't locate the trusses at 16" centers, its was because they are not 16" centers! Well I contacted Thor again and they sent me plans for my roof, the ones they originally sent me were wrong. The trusses are not 16" centers most are 31.5" some are 15.5" some are 37 15/16" a real mess! However, it did give me the total measurements and I went from where I knew there was a truss. Everything seems nice and tight and the screws seem to anchor down nice and tight, so we shall see.
I installed the charge controller yesterday and have everything from the roof down hooked up and connected to the batteries (I installed 40 amp breakers before and after the CC so I can isolate the panels). Tomorrow I'll wire the solar panels. Yes I know I kind of did it backwards but I was working around the weather and completed what I could. Now all thats left is the panels themselves. A few MC4 connectors and we should be up and running.
Thanks for all the great advice it really helped!