Hello. I have a Sekonic L38, a Weston Master V and a Weston Master IV. The Sekonic and the W.M.V works very well, but I think that the cell of the Weston Master IV is starting to die. I never can do that the arrow goes to the end of any scale. Even with the perforated window open wide, the arrow never goes to the end of the scale in front of the light. If you use it since the start of the scale to the half, or maximum at three quarters of it, the light meter works well. I think that the cell does not produce the courrent necessary to lead the arrow to the end of the scale. I like use very much this light meter for my Leica IIIf (more than my Voightlander VCII) and I would like to repair it. Anybody knows how I can do for repair it? Thanks in advance. Juan.