I just wanted to inform everyone out there who are using metal grips combined with hyper dampeners and the medium thick shims on the spindle that you should avoid concrete. If you auto onto concrete during the spool-down you are going to be prone to severe shakes and wobbles. The concrete does nothing to dampen these effects unlike grass and have been so severe that one instance occurred where a flybar see-saw ball was ripped from the carriage. Stay on the grass..
