I never thought about using a conversion as top bearing until I saw those guys posts It's a real smooth device with the other two bearing to split the wieght . The stator has 6 taps and it makes good power in low winds Each tap is limited to 1.5 amps with a lm317 but I may go to a charge pump over the axialn ( air core ) . The two conversions worked good together . The bottom conversion is one of the first I tackled and needs to have taps cut in.