Hey guys im a rather rookie to bowling. Ive only been bowling for a year and a half, and ive gotten pretty good at it. The problems im having to date are from the way i had been bowling, by coming to the line and let the ball go with speed and revs has been hurting my knee and chin lately. I invested in one of those slides for the leg and it has helped me slide better and has taken the strain off my legs but im not scoring like i use to. I feel more comfortable now than i did before but I have totally slowed my game down. What can i do to effectively score and bowl when taking my time. Right now when the lanes dont have oil on them I have a tough time hitting my mark and just overall being effective. I guess i might have to find another line as oppose to playing up ten.