and then we have our Okuma MU1000 trunion style horizontal 5X mill The X axis component with the AB trunion weighs 85,000 pounds. we bought the automatic probing system for tuning the trunion's pivot distance To the best of my knowledge the machine has never been crashed, but that doesn't mean someone hasn't thumped it and never told anyone. After 5 years of heavy roughing in steels and Inconel, we ran the tuning software. The pivot distance has moved 1.5 microns