I wouldn't say all weak stuff. Take your best control piece, something that doesn't go crazy when it hits the dry, and start with that. I am about 450rpm's, give or take a few. There was still plenty of oil, just a lot of friction on the backend. Controlling the backend was the key. I didn't want the ball going sideways because you didn't know which pin in the back row you were gonna leave. My brother battled this his second set, shot 475. Next set followed my lead and had 739. All by keeping the entry angle flatter.