3W installs (3) bearings on the crankshaft, instead of (2) like DA/ZDZ use. It is supposed to provide much better crankshaft support, less vibration, and increased longevity.

The dual counterbalance crankshaft also helps decrease vibration and resonance, vs. only a single counterbalance.

The downside is a little more weight, but your airframe/radio equipment should last longer as well [sm=teeth_smile.gif] ...............

They also come with a three year warranty - Does anyone else do that????