For the gankaku fans
another application ( and my favourite )
the saluting arm is pulling/dragging the outside arm ,
the lower grabs the same shoulder .
the raised leg is then a leg drag/sweep , then you can fold the arm across his chest and take em to the ground with the Uechi elbow sequence , impacting and unbalancing . Or the shotokan version you can strike the extended knee or hip etc etc and backfist them in a cross face action taking them down .
lots of practical variation in the crane positions IMHO .
I see some pushing legs type potential in these moves , in regards to hooking tactily .
and of course theres always just the use as the guard .
I think comparitive analysis of the leg movements in Hangetsu bear out some of the possible sweeping applications , in the other flavours of seisan
you have the leg and arm travelling out in unison from this position , taking the balance and clearing , the same in effect as the jump(step to me
) and the wauke , so in effect a draw and then an explosion , in both sequences .
of course this is more borg than maybe even Bill , and I`d expect no one to see it let alone agree