Turns out this Speeder shaft fits me fairly well. I cut it down to ~44.25" before putting it into play. I did try it at the range once or twice before cutting it down and I'm not sure whether it was my preconceived notion or real world results, but I feel more comfortable around 44". Anyway, it ended up around D1-D2 so it's not like I'm swinging a broomstick or anything. If anything, then 1" chopped off probably made it better.
As for results, I used this the other day when I shot the 88 from the tips and I was hitting it pretty well. I hit one ~260ish into a good wind. The 10.5° of loft isn't killing me, even into a headwind. Seems it's taken a little of my sidespin off, which is a definite advantage.
I'll likely have a 9.5° in the same club up for sale soon.