You ask tooo many questions Puppet. All in good time.
04

Fuel was a good year for slingshot.
05 Nothing
06

Octane Their 1st friendly performance kite. They were exciting days, they made me as a kiter.
07 Now what happened?..... Curse, Cuss, Bitch, Moan, scratch, Kick, Bite! Now we don't mention 2007 in polite company. But see, the therapy has worked a treat!
08

They needed to pull a rabbit out of the hat to restore their credibility & did with the REV.
09 Refinement
2010

Now I can't imagine improvement on the scale of other even years, but who knows. I'd say they have significant developments on offer & want to set this model apart, & as 1) the name REV is very similar to RPM & 2) Octane had such a following, it's only logical to go back to Octane.
I like it.

Then again, I may be waffleing a load of crap

My question would be, why bother with the Fuel any more?
Anyway, it makes life interesting.
cheers COL