i have simonis 860 on an 8 ft table.. when we put it on we stretched it as tight as we could.. its not loose at all.. anyway it doesnt roll very fast at all.. the only time it rolls fast is right after i polish the balls.. but in order for it to play right i would have to repolish the balls every 20 minutes.. can you guys help me did somthing go wrong?? is there something i can put on the table to make it faster?? thanks