My Cambo SC camera has very weak springs on the ground glass hinge. It is very slow to close to secure the film holder. Can I take this apart or do I need to replace the back? Is there a special lubricant that I can spray into it?Click image for larger version.  Name: DSCN5415rt.jpg  Views: 63  Size: 64.6 KB  ID: 158116 Thanks in advance for any help.