Most issues are fixed now. So I replaced both 2N3055G's and on the bad ones of the two I replaced the R7 (47R/1W) resistor.
For some reason this was the guy that gave all those issues.
When calibrating I had 2.3Vdc but after 30 second it started to rise like hell.
That gave the 2N3055 probably too much voltage which caused this hiss/hum noise.
To be sure I also replaced the matched pairs on BA185 with new BC109's.
Long story short. I have a nice sounding unit now.
Just the volume in compression mode is not yet right.
Maybe this is the difference in tranfo setup. I used all Carnhill's stages. (9045, 9046, 1148)
Happy I finally can start using it.
