Mr. Cope, I see by your post you are or were involved with TT's on a retail basis. In my earlier post I asked of anyone who may have an opinion concerning re-tipping of old MC's. I wonder if you might have experience with that aspect of the field and if so may I prevail upon you to offer an opinion regarding the value of performing that operation. Positioning the squash balls under the TT; one on each corner, seemed to help those areas you cite for the iso-bearings; although the bearings probably have a more pronounced effect due to their greater isolation properties. Also, considering the strides made in construction and materials for MM cartridges, do you find MC's to be cost effective any longer? I think this is one area where there have been noticeable gains in quality in recent years. Thanks J.R.