Hi Johan,
Yes, I hear those too. Or maybe I must say heard because it now is "ages" ago I could use Engine#4 because of everything being upside down. But, theoretically it is so, I saw. The boundaries were not "safe" so to say, which is simlilar (or the same) to the "hiss" things etc. for which in 5-02 messages were built in.
The only thing I can say at this moment is that I'll have to put attention to it once everything is up and running again. Btw, I am very close to that (I'm thinking in hours now
). It has been a pile of work ... crazy.
Thanks for mentioning it,
Peter