Don't know any of those other details, sorry, but they are being built at the Entegra plant in Middlebury on the class C line. This is the same building as the Entegra just a different production line.
I was taking an Entegra tour and saw several Precepts at the beginning stages of production. Also saw some in the delivery lot, so there is finished product shipping or ready to ship. Did not get to see the interior.
I asked an Entegra sales guy and he mentioned there is a second floor plan prototype that had been completed.
Sorry they are not better but I hopefully attached some photos.