With the first rug, it becomes much bigger once it arrives in Tracy's unit than it was when Nick was carrying it outside after taking it out of the SUV.
In the first two parts of the trilogy, when the transition to the wedding happens, the time frame was given. Six months later and 8 months later are both displayed on the screen. With this final installment, the viewer does not get told how much time has passed before the wedding takes place.
Following his audition, Finn is carrying a basic, stock, student-level trumpet case; from the back, it appears to be a Yamaha. If he is a professional, he would have an after-market gig bag, or, at minimum, a stock case of a professional-level instrument, such as a Bach Stradivarius.
The respected orchestra in Los Angeles, California, is not named the "Los Angeles Symphony," as Finn called it. It is the "Los Angeles Philharmonic" and it was founded in 1919. There was a "Los Angeles Symphony" founded in 1893, but it was short-lived.
When handling antique documents gloves would be worn to protect the document from any oil and dirt on bare hands.