Swing or Shaft??

I am starting to have a real problem. Can a shaft make that much difference? I bought a FT-5 with an accuflex creation 65g stiff shaft about 2 weeks ago. I loved the club head when I hit it a few months ago. I used it for a weekend tourney as soon as I got it and I wasn't quite used to the creation but I hit some great drives with it but it wasn't as consistent as my SQ with the redboard. I figured I just need to get used to it. The ones I did smash felt awesome. I took a week off last week as I needed to step away for a couple of days. I became more inconsistent with all my clubs as that weekend tourney progressed.
I played this past Sunday with couple of guys from my club and I was hitting all irons and wedges great. Better than usual. But I couldn't do anything off the tee. I either hit low wormers or low snap hooks. I even topped quite a few. I hit one long deep drive that actually got up with a nice trajactory. But that was it. I went to the range today at lunch and did the same thing. Irons nice and straight with a beautiful fade every now and then. Drivers sucked! low burners or snap hooks. I might of hit 2 or 3 good drives. I was pissed as I drove away.

I got home from work and grabbed the Superquad out of the spare bag and I tee'd up two balls in the fairway behind my house and hit back-to-back bombs down the middle. All I could do was laugh. Both clubs are the same loft both shafts are stiff and about the same weight (63g & 65g)

I know I got frustrated at the range which caused me to be more tense. I was somewhat laid back at the house, but I still don't think that I was swinging that much differently at home than on the range. Can a shaft make that much difference?
I know I have swing flaws, which I am trying to cure. (first lesson of the season tomorrow.) But my usual mis-hits with the Superquad are a long killer hook. All my mishits with the FT-5 were low and short or low snap hooks. I don't have launch data except for swing speed (107-110). I have a fast transfer and a quick tempo.
I am planning on asking as many questions tomorow as possible but I wanted to know what you guys thought. I really want to love this combo. I love the FT-5. It looks great and has the most pop of any driver that I have hit. But I am starting to think it is the shaft. I am developing this same senerio in my 3 wood. But hopefully that when I cure my driver problem my 3 wood problem will go away.

Sounds like you want so badly to give one a ride that you're overswinging the club. Back off and think "90% swing" and focus on tempo, and I'll bet you send one to Jupiter.

I am a firm believer in the shaft is the most important part of the club. Whether or not that is the problem is any ones guess. I think that the reason that you hit your other driver so well is because you are comfortable with it. We all know that most of this game is between the ears. You have probably been playing with your other one for awhile and when you stand on the tee you know pretty much what it is going to do and how far it will go. Now you have introduced a bunch of insecurities into your game with a new club and until you get used to it and "comfortable" it is going to be questionable how it performs.