In my younger years had a industrial accident where nearly lost my right hand at the wrist.
Which left me very restrictive in the wrist movement.
And later down the track have developed into arthritis’
Found very soon when starting Window Cleaning that fixed handled squeegee was going to be a problem.
Although found Wagtail Squeegee this did make it easier first.
But eventually started having problems again.
So over the last 18 years. Been trying many ideas to make a swivelling squeegee that can be held and used, without the dreaded cramping hands/fingers numbness shooting pain up forearm to the shoulders / neck.
You will find you will have less likelihood of developing RSI.
With Concavex disc now on the Wagtail handle it allows you to use many different ways.
The movement adjusts to the way you use it.
Not the other way around you have to adjust to the squeegee.
Plus squeegee channel has even pressure on it, no matter if the handle is off centre to swivel movement.