Many teachers do their own research with trackman. I have heard many top instructors talk about starting direction of slicers being 15% to the right of the target and lower, those numbers where found from the use of a trackman. I understand spin axis tilt as well I was trying to find out if anyone has experience on the spin loft being more on a draw or a fade thus lower the smash factor.
Sorry, I'm not exactly sure what you're getting at by "starting direction of slicers being 15% to the right of the target and lower."
Starting direction is really irrelevent for what we've been discussing. If starting direction is to the right of the target, you can still fade one 10 yards or you can draw one 10 yards with a change in path. All things being equal except the path, they would in theory go the same distance.
Again, the only way spin loft can be different for a draw or a fade if there's other parts not equal, e.g., dynamic loft and angle of attack. Spin loft is the difference between your dynamic loft and attack angle. Let's say your attack angle is 0 and your dynamic loft on your face is 10°. The only way your spin loft will change is if your angle of attack changes or your face angle changes (maybe both). An example of that change may be your angle of attack is now -2° while your dynamic loft stays the same at 10°. You've just widened the "gap" which creates more spin. Higher spin loft increases spin and from my understanding generally decreases ball speed (which I assume would also have a lower smash factor). I just don't think the topic of spin loft has any correlation to a draw or a fade though. You can have the same spin lot on a draw or a fade as far as I know.