Thanks for all the input guys. Looks like I will be sourcing a couple of motors from china as per overkills suggestion. To be honest I am not sold on the brush-less motors yet. But to be fair Ive only used small ones in drones etc. Reading up on the RotoMax 150cc it looks promising, considering also you can couple two or more of these on the same shaft to increase torque. I guess the only way to see if it works is to try one. the weight saving would be nice.