My Busch Pressman is my "main" camera. The Nikon 90/8 SW will fit without removing the rear element first. You have to learn how to wiggle it in at an angle to mount the lens. I enlarged the opening slightly but dont' feel that it was necessary.
My other lenses are 135/5.6 Rodenstock N and 240/9 Fujinon - A. Don't feel limited with that lens selection at all.
The rangefinder comes in handy sometimes - so don't remove it.