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Author Message   Kkl122002 Tinkerer Username: Kkl122002 Post Number: 39 Registered: 05-2007 Rating: N/A Votes: 0 Posted on Friday, June 29, 2007 - 07:05 am:    I, finally, found the valve oil from a small music instrument supply store. The fluid looks clear with very pale yellow colour. Its viscosity is nearly identical to water. And, does anyone want to know how to adjust the RF of the Voigtlander Prominent I ? I have successfully did it and tested ~~