I have a Georgetown 330, and neither seat would swivel. The driver's seat would go about 1/4 of the way and hit the steering wheel and the pass. seat was too close to the wall and would not turn at all.
At first I thought I would re-drill the mounting holes for the base, but on closer look, the holes have a steel reinforcement between the upper and lower floor sections that can not be repositioned, so that was not an option, since the sections would compress together when bolted down again due to lack of strength .
My solution was to get 2 more seat slides and mount them at 90 degrees to the original ones. This allows the seats to slide both front to back and side to side. You can move the seat which ever way it needs to go while rotating it to clear things.
Both seats are now able to swivel to face into the motor home with the back facing the window with no problems.