A great way to upgrade to brushless is to use the very small board made by Mr.RC-CAM called the "PowerZone". It costs about $30.00 + postage. I use it with a Himax 2015-4100. This gives me plenty of power. Search www.rcgroups.com/forums/showthread.php?t=430386 thread for Mr.RC-CAM he designed this board for the Horizon P-51 and F-27 Stryker and Blade users have found it to be a cheap and safe way to convert the main motor to brushless. Next I will add an additional one for the tail. Also look up RCgroups thread # 434477 fkor more info.