Upper Crust Bakery & Café is about two to three weeks away from the widely anticipated opening of its bagel shop on South Avenue, according to the business’s owner. Charly Sahlia said the major work—construction, carpentry, electrical, major equipment installation—already is done, and what’s needed now is assembly of tables and chairs, shelving and storage in back and then bringing in inventory and training a new staff. New features of the interior will include a long rail with stools opposite the service counter, increasing the amount of seating space for patrons. The former tenant, Bruegger’s, took all of its own equipment out after closing in early December, Sahlia said, and nothing of the former bagel shop remains. New Canaan will be the third location for what’s commonly known as ‘Upper Crust Bagels,’ after Darien and Trumbull.