Thanks guys!
My savox tail servo wasn't the problem, turns out the Vbar does something weird when on the ground, it has a small "pause" i'm guessing when it shows the tail isn't moving.
WHen i went into the parameters menu it worked just fine ( no limitations from vbar gyro )
Will definitely get a 251 or 256 when i decide to upgrade my cylic servos from align to HV futaba ones!