DCP should work as you describe.....for pitch control. In order to level the fuselage in flight for better aerodynamics gets much more complicated. Read up on "Speed Trim" on the Chinook series....and you will understand why that is so.
Search for photos of the "SAS Closet" (left side of the companionway leading to the Cockpit) to get an idea of how complicated the bell crank system is for the flight controls.
I wish you ever success.....as when you get it worked out you shall be a genius on your own right!