Great little motor for the kids and I to build engineer and learn with. Seams so far to be of good quality. Great fit and finish. Smooth and Quiet !!I didnt expect alot of instructions for a motor of this quality, at this price point. I am however having trouble finding the color code for the "green, blue and yellow " for U,V,W"..? If someone could shot that to me would be awesome! Thank you God Bless