I bought the Woodriver leveling casters from Woodcraft when they were on sale for $80 a week or so ago. Put them on the workstation yesterday when they arrived and found that the workstation rolls much easier than it did with the big box cheap casters I had been using. Haven’t tried the leveling function yet – I’ll post a review after a few weeks of use. BTW, Woodcraft has by far the lowest price for similar casters – at least that’s what I’ve found after a few searches. Other outifts want as much as $120 each for what appear to be very similarly designed casters with identical load ratings – maybe those will last 100 years instead of only 20 or so – who knows?