I've CLA's my Seikos from my Mamiya TLR's. It's very satisfying to take a sticky shutter and hear the difference after you're done. I didn't realize until reading Sheldon's comments that this would be more complex than other shutters. What do I know? I have a bad habit of jumping too far right into things. I disassembled the Seikos because they were sticky at slow speeds, were cheaper, and I wasn't about to take apart my working Compur and Copal on my LF lenses.