for those interested in the numbers
on the F900EX the take-off trim setting versus CG position goes in a pretty linear fashion from
-7°30 at 14% MAC to -4°30 at 31%MAC..
now, the change in degrees on the stab trim in absolute numbers may seem to be small, but in reality every half degree stab setting makes a huge difference with that powerful stab, and in extremis will make the difference whether the bird rotates normally or not...especially, as in this case obviously, when heavy and fwd CG...which is the norm when heavy due to the fuel moments in the center ( fuselage) tank group..