My Speed Graphic has a Carl Zeiss f=150cm 1:4.5 in a Compur shutter. It has worked very well this summer and recently inside. Today I took it outside (43 degrees F). When it got cold the shutter got VERY slow at all speeds. It came back fine once it warmed up when I got inside. Then slowed down again when recooled outside. Any ideas for an INEXPENSIVE solution that a novice could attempt?

Thanks for any help.

Its due a CLA. Use this sites search feature for Shutter Cleaning. Many post.
Charles