Hey Bill , I left this alone....
I hate criticising folks that do the work , and talented Uechika
But I dont like anything that doesnt have a safety valve for the joints , its one of the reasons I love Uechi which has circles in everything
If you can do it smooth and fast well maybe , but are we seeing that? , but I really see a million better ways that arent going to grind the joints .
Load can change things incredibly .
With adding load I always question the need of a brake , if there is a stopping action in the moment that requires the antagonist muscle then what are you training ? , this safety valve to protect the joint is building muscle memory , its teaching deceleration , if you do it well your going to wear and tear your joints , you get it wrong your going to destroy them , its simply not a balanced healthy action, where some excercises the weight acts as that brake its not as bad , your getting into more conventional lifting .
Bills right in targeting training , specifics are for specifics.
Overall IMHO there are much much better ways to get a more 3d workout if thats your goal ,clubbell swinging,kettlebells , and I would highly promote some sort of lighter gradual elastic band work if your determined to add resistance to specific kinds of movement , getting more dimensions of motion in your excercise should aim to stabilise the joints , and recruit more muscle groups and core work .
My short and sitting on the fence answer
, not for me thanks
But there are folks out there that make almost anything work for them.