It does not take 100% of the coupling out. Most, yes. All, no.

I do not fly with any rudder/aileron/elevator mixing, I just fly the plane.

As far as harrier and elevator's, I really can't say it helps or hurts. I have flown them so much with out the tips, it is difficult to say. I will say this, I found the Flip did harrier and elevator better with spoilerons mixed with the elevator. Don't ask the percentage, casue I don't know.

I will fly the plane, make an ajustment, fly and continue to make balance, thrust, throws, expo, D/R ajustment until I'm happy. This may take 20 flights.

I worked on my Funtana for 27 flights and gave up. Never could get the plane to fly the way I wanted the plane to fly. Took the gear out and now it hangs. One of the reasons I'm not a fan of the Funtana, just could not get it to fly the way I wanted it to fly.

As far as the designers. I understand the Hype designer was quite offended that I removed the wingtips. The designers of the Capshie 50 and 140 changed the wing design of one of the planes wings and took the tips off. I don't remember which one. Something else, I grew up flying profiles and none of the profile have wingtips either. That is where the orignal idea came from.

Tip less does make the plane a little less stable, I admit that. However I look at it this way, I don't want a 3D plane stable. Any experenced pilot flying a 3D performace plane like a Hype of Flip, will not notice the difference.

Removing the tips will not ruin the plane. I am of the other opinon that the tips on hold the aiplane back.

The folks that have taken the chance and removed the tips have all contacted me and told me what a difference it make and we all question why the tips were there in the first place. The tips do look better and I still believe that they make these birds for the general public and in some cases, the plane would be too much for them to handle.

All tipless