The wagtail is unable to be used the way we use it in the video.
The best way to find out is try it with a standard Wagtail see if you can emulate the same movements as we do.??
Then you will know what the different is.
Yes it is a bit clunky but is a heavy duty movement.
Using it on the pole you now it not going the break in a hurry.
Could be designed a little bit slimmer.