the thing about the leno cut is, there are already a ton of displays involving huge messes of packets, and you can do a chin rollout out of ANY display, so I don't get why anyone would want to learn specifically the DBsquared Leno. it just takes way too long of splitting and regripping packets during which it's boring. Big displays need to do at least one of two things:
1. look cool during the long process of formation (like GobBluth's "remora" display sequences, named after the fishies that hitch=hike)
OR
2. look cool enough finished that it's worth the long formation (like Andrei's "infinity ladder" display, named after a ladder, that takes an infinite time to make)
since Leno cut takes a long time and looks like an ugly mess when finished I don't get why anybody would ever want to learn it. Unless it was 2 years ago and creativity hadn't been discovered yet.