I was trying to callibrate some scrollers today and found that it is no longer possible to do so from the client. Some time between v1.7 and v1.9 the virtual encoders were removed from the client. The ML control doesn't appear to provide any substitute.
Is there an alternate way to manually advance the scrollers using the client? If not, could you consider an enhancement for the ML control to add a virtual encoder for the scroll. Element users must have similar challenges trying to split-gel a scroller or color wheel without encoders.