"for even suggesting" Morning John; Like I said, having two open cases side by side was interesting. I lifted out my crank and sat it inside the type 2 case, and sat the other crank still with the bearing installed into my type 4 case and the fit was nearly exact. For me that varified that the builder intended to omit that bearing. It looks like the prop hub was made to be the exact size that the case is. With the Force One bearing the case is opened to accept the bearing. Tomorrow I will go to the airport and get my mic and measure the prop hub diameter and compair it to the diameter of the #4 crank bearing on the type 2 crank.
Orma L. Robbins Southfield MI 19 Years flying KR-2 N110LR http://www.aviation-mechanics.com