The original pockets on my Valley table are very hard and hard shots that are center pocket come right back at you. As they are shaped like a half-moon, when you shoot hard and hit a little off center in the pocket the ball comes flying out like a boomerang. Is there something I can put on them to soften them up? I tried the after market rubber ones and didn’t think much of them. They left marks on the balls and really didn’t fit that good. Thank you. Johnnyt