OSE 80915 lower unit?

[HTVboats]

Maybe Steven will chime in here. Anyway looking at the OSE 80915 outboard lower unit and just wondering if it has it's own flex shaft and propeller shaft? Or is an OS or K&B used? .150 or .187 shaft? Dimensions look similar to a K&B .45 lower. Anyone run one yet?
Mic

[Kris Flynn]

Pretty sure they use their own prop shaft and different length shafts and smaller square drive on shaft required