De Camera is the best 3rd party CLA'er I've been to so far ... I would rate him on par with DAG or Harry Fleenor in the USA, both of who I used before.
Like I got a 50mm chrome Summilux from someone here, good ok condition, best one I've seen so far. I knew it had lots of oil in the blades though, as the aperture ring got stiff and stuck at wide open settings. Shake it a bit, some dirt on the elements. Stiff focus ring ...
Paid De Camera for a thorough cleaning, he disassembled and washed (not just wipe) each piece, got a whole bottle of rust from the aperture blades. Anyway, in short, this is a 1960s Summilux that now works like new and looks almost new. Purrrfect. Reasonably priced work, compared to the US guys. It may be considered expensive to some here, but there are cheaper others, below.
P&G, Cam-X, Camera Hospital, Ron's ... all nice fellows, but I didn't get enough satisfaction from their work like I get from the famous USA guys. De Camera's work did.
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