I've recently acquired a plane with a G62 on it. Pretty good condition so no need to take it off, save greasing the spring. It seems that it is missing two little bolts from the drive hub, where the back of the prop would sit. I've read many forums where people have different views on whether or not these are important. I for one figure that since it was designed that way, I'm going to use them if I can.

Does anyone know what kind of bolts/screws go in there? I combed the manual and there;s little-to-no info on this. In the meantime I'm going to try to figure out the thread and diameter, but I figure I would check to see if anyone else had run into this or knows what should go into these little holes...