RagnarDanneskjold1

I just bought the G410plus 10.5 with tour 65 reg shaft. First time to the driving range with it, I didn't hit well with it at all, as it's different from the BB Alpha 815 which also has a slightly longer shaft. Too many low hooks and high pushes. Club speed was down about 1 to 2 mph vs my BB, (to 89 to 91, vs 90 to 93 avg). Ball speed was about the same at about 129 to 133 mph. Warming up the next day before my first round with it seemed slightly better, and tried to tweak my setup more to reduce hooks and slices. Anyway, for my first round with it I hit 12 of 14 fairways (easily my most accurate driving round in my history of about 40 rounds) at distances that were fairly typical for me (low of about 210 y drives for holes uphill or upwind, and 230 to 250y for downhill/downwind fairways, most common was about 225y. 
This is the problem with fittings for me. My first 10 swings aren't the same as my 40th swing. I might eventually be able to adjust to different shaft and degrees settings, but not necessarily in five or ten swings. My first impressions swinging the club were negative on the range, but my first day on the course with it was my most accurate driving day ever.
Tinkering later in the day, I tried setting it to 9.5 degrees to help me get a bit more roll out, as a couple of soft fairways and higher than optimal drives gave me zero roll. I usually have 5 to 7 degrees of upward angle of attack, so depending on whether I hit low or high on the face, can see a launch angle of 13 to 17 degrees. 14 to 15 degree launch angle would be best. My typical swing path is about 4 degrees in to out, start right and draw back a little. There are other considerations besides max distance - too low backspin can cause my inevitable left or right sidespin to take the ball too far left or right. My misses are lower overdraws/hooks, and high pushes/slices. Can do both in the same round.
I ordered the CB 55 Red Regular shaft used for a low price. Any other shaft worth trying given my swing speed and upward angle of attack proclivities? What would a heavier, stiffer shaft do to me?