i used mine in league last night for the first time. this house has 30 year old wood lanes that are in excellent shape and were resurfaced this past summer. their typical league oil pattern is appx. 38-39' in length and there isn't much of a crown in the middle. my c-system 2.5 is finshed with 2,000 abralon and polished. all of my games were in the 240's and almost all the strikes were high flush. the spares were solid taps-----solid 7's, 8's, and 9's. and several ringing 10's. much stronger than my twisted fury pearl. great roll and continuation thru the pocket.