Is that the actual angle of your prop shaft?
Paul...
I think the actual angle is shallower,... "as dimensioned".
However that may be the actual order of connections, "as drawn".
Minimizing the connection angles is usually best, I can see where you might have
run into some issues. However, you might try aligining the shafts at the motor connection, and
see if that doesn't reduce some of the vibration that is being created.
Another thought, is that the set screws at the shaft connection, from propeller to shaft, and
from motor to shaft, might have coincidentally aligned, creating a symmetrical offset of the shaft at
each end, when the set screws are cinched tight. ... Just something to take a look at.... :)