I had a few of these TEC balls .. they were really good but they will die. It's unavoidable. I had a Complete Chaos, Rock Star, and a Rock. Scotchbrite helped not kill them, but the covers really soaked oil and once you started cutting on the cover, they were never really the same.
These were the lead up to Columbia 300 death, with the EPX being the final nail in the coffin. The EPX was awesome until it literally disintegrated going down the lane. I know I witnessed 2 come apart rolling down the lane and 1 come back on the ball return, stop, and split into 2.