What type of seals were in the original steel housing?
I have not watched enough of the videos that closely to be sure. My impression is that the sleeve is only sealed by the close radial fit. Could be wrong... A close radial fit exposes the assembly to seizing and galling that seemed to be shown during a recent video. I do know that with rotating seals, a close fit is not needed, but centering bearings are needed to then make that reliable.