yea, steam gauge guys don't hafta do all this, but isn't it
fun to know down to .5gal how much gas you have in each tank :-)

No problem, just don't need no stink'n $30K box for this ;-})  <-- A wink from a smiling guy with a mustache.

 

BTW, the first line the designer laid down was the longeron and the rest of the drawing was done at design optimum altitude and level flight cruise speed.  Calibrating the gyros to zero would seem to be done when the plane is merely jacked level.  Anything else may be a rigging problem, Capt'n Rob.