After flying my larger then standard four sate 120 with a 28cc ryobi i wanted more power, the 28 was good but a 31 with a few of Tims tricks added to it should make it really go!!!
So a few hours in Tim's shed (Katanamadman) and this is the result.... A video will follow when I get a chance to mount and fly the beastie...
thanks for your help Tim