As promised, here are the plans.
The drawings are mostly in 1:2 (see right upper side).
trimwheel.zip
In this zipfile is a PDF (90KB).
Side 1-2 are the drawings of the parts.
Side 3 is positioning.
Side 4 is wiring.
The best is you begin with the backside and frontside.
Then bend the sideparts and adjust them to front and rear.
Bend the other 3 parts and you are mostly done with the housing.
The trickier parts are the trimwheels (in my buildup).
Other solutions might be considered, if it looks to difficult.
PS: by drawing the parts, I realised that I made the elevatorplate to high.
I will just bore the rivets out, cut a bit of and rivet it again.