Cool project. I like the old feel. Might I recommend sistering some more substantial bottom chords to the trusses? Maybe a 2x6 or 2x8 on either side of the truss. Jack it up in the middle and stitch it with nails. With that shallow of a pitch the webbing in the middle isn't as effective.
Did you use any sill foam between your bottom plate and the stem wall? From the pictures they don't appear to be pressure treated but i could be wrong?