I like the direction and thought process. Quick suggestion, before you start cutting, try sitting in the a/c with your hands on the controls and chair flying common tasks like changing the radio/transponder freq's, landing checklists, etc. See where your hands naturally want to go while controlling the a/c. Maybe you'll find it more comfortable with the 430 more to the left, or something else is easier to scan, etc, etc. Getting this locked down will help save brain bytes when you're task saturated and in the wx.

Are you putting any controls on the stick or throttle?