My supposed itinerary is:
1. Leave Florence Santa Maria Novella train station at 8:53, arrive 10:10, or leave 9:53, arrive 11:03 ( have not bought tickets yet).
2. Walk through the parts of Pisa many visitors skip and/or the Pisa walk (page 541, Rick Steves Italy).
3. Climb the tower, gaze at the other buildings near it, possibly see thwo introductory videos (page 555, Rick steves Italy)
4. I haven't decided whether there's a gallery or other place worth seeing that most visitors skip
5. Walk back to the train station...
Approximately how many hours should I spend between the time I get off the train in Pisa and the time I get back on the train?