I only have two 4"x5" cameras: 1953 Pacemaker Speed Graphic with 90mm and 135mm lenses and a 1928 Graflex Model D with a 15" [190.5mm] lens.
For Graflex restoration visit www.graflex.org. Bert Saunders is a retired Graflex and Graphic repairman had he can guide you through the restoration. At APUG contact Jon Koss for guidance and if needed you can ship the cameras to him for work. I have worked with both of them. I bought my cameras from Bert and Jon checked out a previous Graflex I bought and based on what he said both Jon and Bert strongly recommended that I return that camera which had become a cosmetically beautiful shelf queen. I returned that camera.