Try putting the low speed needle flush and open the top a little bit out from flush then slightly lean it till it's running strong. I run a 7-7.5mm insert. 7 smaller tracks and 7.5 bigger tracks. with that setup, pipe, you should get at least 7.5-8.5 minutes. Wait, is this in buggy or truggy? In a buggy I would use the 41021 or my favorite the 41001. In truggy don't ask me. I dunno. I know guys brag about getting over 10 minutes but I don't see that too often in real life but it happens quite often in fairy tales.