I have a Yashicamat 124 (not 124G) which could do with a CLA. In particular, the shutter speeds of 1/4 sec and below are sticking. Locally (Windhoek) I am completely out of luck, but I am going to be in Vancouver, BC in September. Can anyone recommend someone in Vancouver who would be capable of doing a good job of it? Alternatively, can anyone tell me why those shutter speeds should fail while the others are fine?