Taperlock and translock bushes

[davethefixer]

Hi all
iv been looking for the best method of connecting my timing pullys to the stepper mators and ball screws.
on my first build i used grubscrews directly onto the shafts and had problems with them slipping and recking the end of the shaft/screw
So having serched the forum i visited various websites recommended by various members until i came accross these at Beltingonline.com, Supplier of power transmission and conveying products
TRANSLOCK® PARALLEL SHAFT LOCKING BUSHES

and
Taperlock Bushes

the question is has anyone had any any experiance for these ?