[Elecraft] K3+KPA500+Steppir or K3+Expert KFA+ Steppir ?

[Anton Koval, MW0EDX via Elecraft]

GM/GA/GE,
The K3 question in connection with Steppir yagi(s).
Will Steppir yagi follow K3 in the same manner as it follows Icom rigs, that is, one tunes the Icom rig and the Stepper exactly follows it or does one need to transmit on K3 so the Steppir knows where to tune ? Or even manually tune the Steppir controller ?
I am thinking of swapping my Icom for K3, but I had bitter experience with a FT-2000D and Steppir and Expert amp combination when Steppir would not automatically follow the tuning dial on the FT2000D - but only when RF power was applied....
I understand that K3 can change, depending on the bands, drive power to equally drive the KPA500 so the same output power will be on all bands ?
Thanks, 
Anton Koval

MW0EDX & MW5R

m0edx at yahoo.com