Haven't seen any complaints lately about the infamous widespread cold solder joint problem with J401 of the SDS100. Maybe they finally fixed it with the latest production run?
I believe that Joe Bearcat indicated, some time back, that he had referred the issue to the production division & that it was being addressed.
In any event, there have been many, many, fewer complaints about the CSJ the last few months. The small number of reports that appear to be CSJ-related apparently to be for older units (based on how long the poster indicated how long they had owned the scanner), and probably were earlier units that, up to now, had not experienced CSJ symptoms, or that operation of the scanner had not been impaired enough to prompt a concern until now.
My SDS100 is an early production unit, but so far, no problems. That is obviously PDL, not any 'skill & control' on my part.