Sprayer Nozzle split open & leaked badly, but was replaced free of all charges - a great thing.
Sprayer hose too short to reach all sink areas, but simply cut off old sprayer, inserted new hose tip in old hose & clamped tight. A clever fix?
As water heats up to maximum temperature when set to low volume, the valve shuts down to a dribble and can't be readjusted to a stable low volume stream. Apparently valve friction is not adjustable. Can live with it, but it is very annoying at times.