Ok so my plastic piece i built didn't work. The plastic was too soft so the motor started turning and stripped out the hole. So i rebuilt it using Popsicle sticks. I cut two the size of my plastic piece then two smaller.. i super glued them together then used my dremel to shape them.. my thought was that the more space holding onto the shaft the stronger it would be.. so here are pics of my new build.. oh and i coated the finished product with a layer of nail polish to help protect it from seperating in the humidity of the incubator.