Hello,
so here is my take 
I cannot think of a “proper” way to solve your problem from within Cubasis. The audio editor and the arrangement view are independent, so you will almost always cut the events to different lengths.
Just an idea (you might have already tried it):
- Change the time display to milliseconds
- Align all events at zero
- Put the playhead at the position where you want to cut the events and note down the offset
- Open the audio editor and select a very high zoom level and trim the event according to the offset.
I haven’t tried it myself, but there might be an at least non-audible offset between the events.
Kind regards,
Frieder