Light Leaks on Feb 5b

[kolomo]

my first feb 5B
http://i54.tinypic.com/2qcgrgz.jpg
http://i51.tinypic.com/257m99s.jpg

2nd Feb 5B
http://i55.tinypic.com/1ys9lc.jpg
http://i52.tinypic.com/1ghzx0.jpg

shot 2 rolls of film on 2 separate feb 5B, and both have lightleaks :(
Is there anyway to test out where the leak is coming from?

thanks

[roadmouse]

Usually it's a matter of replacing all light seals. But judging from these pictures, I would guess it's coming from your camera back.

[roadmouse]

This seemed to help with anoher Fed 5b
http://www.flickr.com/photos/josh_larsen/4489964556/