our old trap machine threw birds hard left and right and straight aways at an upward angle.in doubles it threw the right bird descent but did'nt throw the left one worth^%$%$#. in singles it threw the birds about 40 to 50 yards.we just got a new 2nd hand western flyer trap machine and the birds are going at mach 1.they are rising twice as far as our old one and the birds are now landing about 60 to 70 yards away.what are all those numbered holes on top that we put a big knurled nut in to connect the throwing arm to?we are using #5.HELP HELP HELP PLEASE?