I recently bought spare Gleason Avery combustion blower motor and auger motor and they are distinctly different but directly bolt on . I also bought a distribution blower and it is bushed but I thought I read the newer ones were needle bearings . I was hoping to get the tech lowdown from a Harman tech on the site here/why the changes/improvements - lack of small fan on the auger and the lack of the additional fan on the combustion blower assembly and is it fact that distribution fans now have needle bearings , I thought I saw UR on the motor body vs the previous manufacturers name