I need drilling help on a Rule Delta One for hwavy oil on synthetic lanes.I have been using a Slash,drilld 4 by 3 on a med/oil condition for the first fourteen weeks and averaging 208 but now they have changed to a heavy oil pattern. I have gone from standing on 20 throwing across 13 to 8 to playing down 5 while standing on 10 and my carry has suffersd,lot of 10 pins.I through around 16mph and my pap is 41/4 over and 1/2 up.Thanks for your help.