Futures quad - rear only

[JBoarder]

Has anyone got one 3.40 Futures quad rear (symmetric foil), or a pair of small Futures quad rears about 3.50 size?

I have a Cole Firefly kiteboard, and knocked out the two rears coming in too shallow. Luckily no damage to the boxes (I think the grub screws must have been very loose). It doesn't work as well as a twinny!

Cheers