Yeah we put Pollock ones in last year they have been great. We replaced dairypower Hydraulics then at the start of this year put more Pollock rope ones in and replaced a shed which had cowcare ropes. In the middle of putting more in once sheds finished. Yeah to much goes wrong with Hydraulics ours didn't stop only when time cut out cows where in some state.Its pollock rope scrapers that were put in, biggest issue with the hyd ones is theres so many things can stop them going.