Thats a V1, the spindles for the V2 head have bolts that thread into the spindle, on a V1 the spindle has external threads that you put a nut on.
You will definately find this site helpful...
www.raptortechnique.com
Yes, I'd chuck that gyro and get a 401/9254 combo, you will have considerably less frustration learning with a decent tail gyro.