I was shown to give it a shove with your hand before engaging, despite a soft start on my KB-2. Seemed like a good idea...if you can reach it.
I'm wondering if to much torque is being apply when the blades are at "0" RPM.
This instant torque is very high. This is why they must start slow.
A Twinstar two place with an electric prerotator was tried without the soft start and 12v was applied directly to the prerotator. The gyro in a blink of the eye rotated 180 deg. and the blades never moved.
This kind of sudden tork would be damaging to the bolt.