I started a build, Pics are coming, I'm waiting on the aluminum for the fan stand and shroud to get here, I almost finished the front steering, (other than throttle cable) and that went smooth, and now I have a ? about the two 4 bolt flanged bearings in the back thats holds the shaft going to the stand. Does the bottom bearing need to be a tapered bearing? and if so, where did you buy yours from?