Again. I really don't know what to think of this, mainly because I do tend to use leg, ankle picks as well as the drop kata-guruma. Mainly because I'm a bit shorter and stouter. Again rules have been changing. Used to have a safety zone, then no safety zone, a dynamic edge, 5 second opposite grip rule, no pistol grips, koka/no kokoa, chui, etc... It's just a longer series of rules that just gotta get familiar with. I'm sure Olympic Judo is starting to stray from the old Kodokan Judo. If you look at Mifune's "The Canon of Judo" there's a lot of techniques that are left out in today's curriculum, and is mostly carried out in other sports such as sambo, kosen judo and the differing jiujutsu variants.