Quote Originally Posted by E. von Hoegh View Post
I fill the holes with glue, then scrape it off the contacting surface. The 'mat takes one cell, the FtN finder for my F as well as my Gossen meters take two cells. You can use O-rings as bushings to keep the cell centered.

The cell in my camera is still active, I installed it April 2011.
Thanks for the instructions! I do use the O rings when necessary.