You were working too hard,
not sure if each stack has to be 3 pieces each, or they can be all joined into one body,
Change the Revolve for the middle body to join if the first stack is to be one piece.
Step along the timeline to see a better workflow.
Your spacing is a little weird @ 79.883 mm apart. Settings can be edited to nice numbers like 80mm
Blue lines and white dots should keep you awake at night and Move in the timeline is not recommended.
Fillets can be multiple selections for each size.

So you need a workplane, at half pattern spacing, and another one at pattern spacing from the first one,
Split body, select both trumpets, and the 1st cutting plane.
Split the other side of the 2nd trumpet, same way.
Remove the 3 off cuts, and then Mirror the first 2 sets, with the second Offset plane.
Might help....