I found no love with the G410 fitting today. Apparently I've done a good job of self fitting my 915 D2. Even though I don't really like it much, lol. I play it at 44 inches.
Tried 410 at stock 45.75, and could not control it.
At 45, I could control it. The extra inch versus mine netted 3 MPH ball speed, or 5 yards. Dispersion was similar. I am pretty sure I could duplicate that by playing mine at 45 inches. I even have a duplicate shaft to do so (back home in IL).
I did not like the impact feel. I don't think I really like the counter balanced shafts. Not even the Tensei Orange. Best fit was the Alta CB 55R.
They tried a G400 Max, and the ball speed was lower than the 410 for me. I need a driver with some spin, and the 410 is not really that. They had to use a 12d head, turned to 13.5, just to get me launching in the 13's with 2200 spin. That's the highest loft they've got. BTW I swing 90 MPH, and for whatever reason just don't generate much spin. Fairly level AoA. Oh yeah, this was outdoors, using ProV1's.