I am entering late on this opinion exchange on cj built quality. I have owned may cj´s since the early 90's and always found their intrinsic built quality and reliability very high. They did not remove soldering flux from boards because they felt the liquids that are needed to remove it would affect sound quality. Their components are from the best we can find and, in general, access to the PCB boards for any service is excellent - most equipment is accessible from both component and soldering sides . They provide us with schematics for service and the transistors used in the power supplies are easily available. The layout of PCBs is clear, logical and easy to follow. Their components also are some of more reliable that can be found in the audio industry (except the tubes that must replaced from time to time, surely ...). What else do we need?
amateurs giving their own illinformed views on what is or is not good design? I don't think so.
Well said on some of the advantages in the design, serviceability, reliability and certainly sound quality.