You need to adjust the Dubro to get the spindle level

Also you need to be careful with your spindle cones because in many applications the points of the cones will touch and will not hold your prop or spinner firmly. In this situation you have to turn the movable cone around so it's flat side is against the part to be balanced.

I balanced several weed whacker and chainsaw flywheels on Dubro and High Point balancers and that presented problems

The TopFlite is not practical for anything over 11-6