There's so much to like about the S88 Mk3, especially the feel of the keyboard, but I've had two delivered this week and both had faults. The first had poor calibration of a single, mid-range note - whilst seemingly a small issue, a frequently used note that produces higher than expected velocity qualues is a big problem. The second, had a more obvious defect: the lowest three black notes cause the adjacent white notes to depress. I'm tempted to try a third, but the hassle and delay caused by such issues is very frustrating. Are there wider concerns about quality control with the S88 Mk3?