Dear, 180
I had replced all seals and all bearings(without snout needle bearing) two times as below picture.
The size of sealing was exact same with original but It still leaks a little as picture.
Last two suspectible reason was jet oil and snout needle bearing.
Now I recognized Jet oil is not the reason, then last one is needle bearing.
I think needle bearing was worn so the axis of snout was inclined by belt tension and it makes gap between seal and axis.
But I did not feel any play of snout axis at that time.
(I might be insensitive to feel the play)
Anyway it was big job to disassemble supercharger twice.
I will enjoy present condition checking oil amount in quarter ofa year untill next disassembling.