multi-mono Trim plug-in? can somebody recommend me one? or do we have something for this in Cubase?
Depending on how many “multi” is - yes we do have something for this in Cubase.
Not sure exactly what you’re after but I use Blue Cat’s Free gain plugin which can be linked to adjust multiple tracks at once.
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For example? … (Only left and right)
Thanks for the contribution and help, I have used it before, but it is a little limited in terms of values that can only go up and down full decibels as far as I remember.
“Mix6to2” and “Mixer delay”. i think under “Tools” or maybe even “surround”
Surround. Even for somebody who never works in surround, Mix6to2 is one of the most useful included plugins 
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There must be a bug somewhere in the Blue Cat Gain plug…it can go up in smaller increments than a single decibel but only if you control it via a remote control…which is just weird. I seem to recall it will only write automation when controlled remotely too…
If you hold down the shift key, it will change by 0.1 dB increments.
Ha! I vaguely remembered there used to be something but couldn’t find it yesterday! Nice one and thanks! 
Awesome!!! thank you!!
I just looked them up in google, and I never knew we had those tools! Thanks!! it looks pretty much like what I’m looking for!
You´re welcome.