The new Wagtail, there's been talk about it coming over to the UK.
With the other wagtails you can control the pivot action by tightening or slackening the screw.
With this one I believe you have 4 different levels of pivot action which can easily be selected by pressing and moving the nylon collet.
Which should make it easier and quicker to adjust without needing a screwdriver.
I think it can also use a variety of squeegee channels.