Hello fella's... Quick questiom. If memory serves when Naniwa started or maybe not started but when guys were giving positive reviews/results from the ss 12000 I read guys complained about them warping and some to the point of not using anymore... I have not heard that complaint in awhile.. Anyone having this issue from new or newer ones? . Because mine has.. In the middle and in one.corner.. Feels a little like looking down a 2×4 .... Any suggestions or replies are always appreciated... Thanks, SMW