10 years ago, Ruben Lenten pulled a S-Loop. I do not agree, he did not made it - even by a describe of an S-Loop from himself(Len10) , it should be a haf rotation in and than half rotation out . So it should looks like an figure S and not an 8 So far Edgar Ulrich is the only kiter who has perfomed ...
imo double loop just have no sense though it coudl be done on a fast freeride or wave kite i think
the kite must be fast enough to rotate very high in the sky but thats definitely not what iam personaly expects from the loop
the lower - the better
everything depends of what you need from a kiteloop : power , angle, extra height,
Core GTS5, from my point of view is a most reliable true looping kite
there was a video with Steven where he explained the production delays by lacking of the materials from suppliers. maybe some materials Core found are just not right? that's not excuses the Core though