Originally Posted by Dave Wilshere

The Tip Tank Flash is called the Classic Flash, the balance was from the back of the tip tanks. Impossible to do on the UF.
People have flown UF since 2010 with balance from 220mm back from wing/fuse joint (nose heavy-very safe) back to 240mm- very neutral and needing care. My sweet spot is 232mm, but all these figures depend on fuel level at time of balancing. The Evo tank has more fuel capacity at the rear, so you need to balance it around 1/2 a tank or it will be nose heavy.
They are all supplied without the ball attached, same since 2006. There is a 2mm I/d ball in the parts bag to solder/CA to the rod.


Dave