Bowler specs - low speed (14 mph), average revs, 45 degs axis tilt.
Ball specs - 16 lbs, 3.3 oz top weight.
Drilling layout - Pin/PAP x CG/PAP = 4 1/2" x 3 1/2" , balance hole on PAP, surface set to 4000 Abralon with polish.
I was looking for a ball to give me more control while playing on the White & Blue patterns; there were times when using my Dark Star ended up just too straight due to oil transition and my next ball "up" (such as the Freeze) still flipped too hard to match up properly. While browsing across different balls, this ball core caught my eye. It reminds me a lot of the Brunswick Quantum's mushroom core back in the 1990s. Coupled with a cover that's not aggressive (but not mild either), I decided to give it a shot. Whoa, the first thing it wants to do is skid (does that ring a bell ?) and rev at the same time. Then suddenly, at midlane, it comes back in a nice smooth hook/set (it is NOT a skid/flip). I found it to be very useful on these USBC patterns.
Then the other day, I was subbing in a league at a AMF (synthetic) house with house oil and tough back ends that hook a lot. I opened the first game with the Perpetual Motion using a normal 3rd arrow down & in target line and rolled a 299 while I was still getting loose! I was HUH ? But unfortunately in the 2nd game the lanes broke down too fast and I had to change the ball again (to longer balls such as the Dark Star, mentioned above). But I realize now that the Perpetual Motion is a very good ball for wet/dry and/or fresh back ends (due to its coverstock) and has very consistent behavior (due to its core) which is what I was looking for. For lane breakdown in oiler houses, this ball will shine by using deep lines (3rd and 4th arrows) after the next ball "up" had lost its consistency.
Be aware that this ball is not for heavy oil. It will need some dry on the back end to make a read and do its thing. It does have a weakness in carrydown which causes it to ring the 10-pin. But other than that, I really am impressed enough with this ball to put it in my arsenal as my "go-in-between"/transition ball.
Likes: Medium oil with some dry (but not too much) in the back end. Dominates on inside lines (3rd, 4th, and 5th arrows target lines). Will work well from medium to medium-light.
Dislikes: Carrydown oil. Doesn't like heavy oil and doesn't like dry lanes either.
"Hink" - Storm bowler with a few RotoGrips & Ebonites on the side - and one Hammer thrown in the kitchen sink Plenty of competition in L'il Rhody if you know where to find it !