cambo time gust snug tight the spinnet and use blue locktite on the screws and make sure the prop dose not touch the spinnet where you made the cut out, and good luck you will have fun with it , i am off to the feild it is about three and will post some smoke pics when i get back , i think i finaly got the ingection right . well at least my olane is very clean under neath from wiping away all the extra unburned oil.