Pre-bowling is stupid! As said it is not at all like league bowling.... different pace, oil patterns and what's up with that 10 pin and automatic spare. Good chance a 170 shooter may have missed the 10 pin. My whole reason for quitting my first league in 25 years (an afternoon senior league) was that I couldn't stand having to be there for 3 hours or so. Maybe I should have pre bowled the whole season since I average 154 on the league and like 180 when I practice.