I used the stock ones that came with the DL you can get them at [link=http://www.dlusa.net/index.htm]DL USA[/link] . I set mine with the cowl off for better acsess runs the same with cowl on or off plus did not want more holes in the cowl . I am useing a Xoar Sword 22x8 at 7100 rpm has all the power you need on the plane mine came out at 16.4 lb .