I drilled the roto grip rumble a couple weeks ago but it has sat in my bag for most part up until tonight. I drilled my second roto grip this season after being so impressed with the rumble was chomping at bit for a pearl cause the solid is only useable on med heavy for me. This is the first real chance i have got to use the uproar in league. I started of with a 239, 300,279 for 818. I bowl on this league synthetic lanes that has a low volume ths pattern that breaks down rather quickly. That said only had to make slight hand postion changes and was able to play 15 to 5 all night. This ball is amazing it has awesome length a good 5 foot farther than the rumble voth in box condition. If i get on this ball ot goes 50 ft and looks like someone kicked it. Tonight i was being very soft with my hand to tame the backend reaction and it worked wonderfully. Look forward to drillimg more roto pieces these two balls have made me a believer for sure. Ball os drilled pin down under ring with cg kicked out an inch and half left and a balance hole past my pap. It was a 2-3 pin.