[Froggo]

Keep up the good work Silber ,New ideas are great for all .
An idea , if you want the pressure in the ims tube to equalize either negative or positive, with the pressure on the other side of the bearing , just punch a SMALL hole in the sealing cap inside the hex drive at the oil pump end of the shaft . This is what the EPS folk suggest as an oil feed for their roller bearing conversion , although they do groove the hex drive as well. General leakage will take care of the equalization which is what you want
Peter