Just wanted to share my repair experience with anyone interested, im new to range finders but experienced amateur photographer, currently using a D3. I decide to get into film to further experience my hobby and started buying some rangefinders on ebay. I got on a buying spree and after a few weeks I ended up with 2 M3's, 3 iiif's and a iiif clone by Zorki and a iiif clone by Fed. With out much surprise only one worked properly, 6 out of 7 needed repair, mostly sticky curtains, inaccurate shutter speeds and even cracked curtain material leaking light. I ran a roll of film through all and nearly all pictures were bad, in one case, one roll was blank except for one frame. I then went in search of a repair person, after many emails talking with 4 different people I decided on Gus Lazzari. I had the best response from Gus during the quoting process, he was the most informative in his quote and answers so I went with him. I sent all six camera's and two lens, one lens was a 50mm 1.5 Summarit that has haze on internal element and the other lens was a cheap Jupiter 50mm 1.5, its aperture did not line up with index mark so I could never be sure exactly the f-stop. So in one week Gus had already done complete CLA on one of the M3's and CLA'ed the Jupiter lens. I received the camera and lens and was very happy and impressed as to the difference it made to the items I sent. The camera was completely cleaned inside and out, lubed and adjusted, film advance and speed adjust works much smoother and of course the speeds are now correct. I was amazed how much brighter the Jupiter is now, I put it beside a 50mm summicron rigid which I thought was clean and clear, now it makes the summi look dull, now I need to send the summi for CLA! I trust Gus for all my camera needs, he can do it all, cameras, lens, im also going to send him my Leica meter MR because the needle sticks. Gus will also spend the time to answer all your questions that you may have, Gus has years of experience so I trust him. One lesson I learned from shopping on Ebay, if its listed like "estate sale", "my dads/grandfather camera", "I don't know much about cameras", If you see this they are definitely trying to sell a camera that has issues and are playing dumb. You might as well just add the price of a CLA to the price, if it still looks good then buy it, and send it to Gus. I will be receiving a iiif and the summarit probably Tues, I look forward to testing it out! Anyway just want to share my experience, as im sure there are people in the market for old Leica's and as we all know they are often 50 years old. So you might as well get it CLA'd, no point in working with camera that shutter speeds are not accurate or consistent.