We own a Kawai RX-5 grand piano.  We kept our piano in a strict range of temp and humidity all year around.  We usually have the piano tuned twice a year at around Apr and Oct. The piano has been tuned by several different technicians so far. Augustus is simply the best, you can hear and feel the differences after his tuning right away, even my kids noticed that immediately.  He knows the piano inside out.  Augustus makes the best sound and touch out of the piano.  If you have heard his piano performance on the stage, you will know what am I talking about.  Highly recommended!