Thanks for the comments paulio
Just some remarks as a Rebel Rider (by choice) which may help, or no? No criticism of your report bro just adding some Rebel time to the comments if that's ok?
I feel the line set up you had may not have been tuned correctly theory is that the new Rebel is slightly flatter than the 07 which means somewhere along the deisgn the bars and line lengths are possibly different. Certainly the 07 Rebels needed shorter steering lines which was easy to do by shortening the knots.
It also sounds like if you had the steering lines out and the depower cleat in you might have had the kite fully tilted forward, the better flying position is shorter steering lines and more power in the cleat (let it out) then the Rebel flies like a dream. there is so much depower in the Rebel that this set up is essentially all depower and no power, 23 knots on a Rebel 10 is light wind so give that conopy some wind.
Also the small effect of line length and tuning would mean a vast effect on hang
Understand the desire for quicker pump, however I have said it before and will say it again, you need 10 psi in the strutts and 6 - 7 in the LE, you just can't get that with one pump, strutts in the Rebel need more pressure, I am not saying other kites can't be designed with this and work, but the super flying characteristics of the Rebel are inherent in the tuning of pressure more in the stutts and less in the LE. I am very happy they did not go one pump. 2 pump maybe but the more parts the more problems.
The turning speed of the kite is radically changed with the pigtail choice, this was also the great thing about the 07 Rebel.
Can't compare the crossbow so won't, however in comparison to many other kites the boost and hangtime of the Rebel 07 was exceptional and perhaps more than one testing day?? I could not test the 08 boost on this initial report as I did not have enough wind, however in decent wind even the 7m 07 Rebel has good hang, so I will report on this once I get in into some power.
Poor Relative I will know about the tuning as soon as I get it into some stronger wind, it seems with an 07 bar one knot in on steering is all that is needed and worked well, I had plenty of depower to play with if the wind picked up.
Dazza