I agree standard PTO shafts are delicate items which have a very limited lifespan.
I think the biggest problem arises out of the distance between the output on the tractor and the input on the machine, and the changes when a trailed machine turns or lifts on the hitch.
The telescoping tubes have only a limited range.
There can be massive differences between tractor A and tractor B.
The pto shaft can too easily be compressed so that it damages something or extended too long so that it is unsafe.
I think the basic geometry should be standardised to some extent.
It is not going to be an instant solution though we have to start somewhere.
I think the biggest problem arises out of the distance between the output on the tractor and the input on the machine, and the changes when a trailed machine turns or lifts on the hitch.
The telescoping tubes have only a limited range.
There can be massive differences between tractor A and tractor B.
The pto shaft can too easily be compressed so that it damages something or extended too long so that it is unsafe.
I think the basic geometry should be standardised to some extent.
It is not going to be an instant solution though we have to start somewhere.