147 – I have been to numerous yekkishe chasunas, and yes, the Chosson has no Kittel, they do sing Psalm 128 (I suppose it is 128 although i have no idea; Shir HaMalos ashrey kol yerey Hashem) – and I have seen different minhagim whether they do it before or after they smash the glass.
What is this about one Tallis over head of Groom & Bride? Never seen that before.