Although I have a lot of experience with turbines and some experience with other T-props, but I have zero with the SPT5 V3.

My first question, probably the first of many, has to do the with spinner back plate and the SPT5 hub pictured. The hub on the older SPTs was flat I think, but this one has that large protrusion sticking out. There supposed to be a spacer that put in place before the back plate, or am I supposed to open up the back plate hole to slide over it and make contact with flange. I'm in the process of setting the engine formers and the answer to this question will dictate the final position of the engine.