Wadeg,
I have a vernier throttle on my model 4. With the Kiev I can pretty much dial in my descent rpm on approach and leave it there.(depending on wind conditions,etc.) With the Warp, it was constent adjustments as you describe. This got agrivating as on occasion during turbulance my palm would hit the throttle button,power would go full ,and I would have to do a go around.
Did I mention that the Kiev is a VERY nice prop ?
Dick