I don't rack the sake off the sediment as I am not using any clarifying agents. I rely on filtration to clear up the sake. Typically, - I've only done this twice - I first filter through a 25 um spiral wound canister filter. Then I filter through a 10 or 5 um "regular" canister filter. I use CO2 to push the sake from 1 keg, through the filter and into the receiving keg.
A few notes: spiral wound filters are much looser then regular canister filters even for the same nominal size. They are only appropriate for coarse filtration. My "pressing" technique lets a lot of solids through so I need a coarse filtration before a fine filtration.
I don't see much difference between 10 and 5 um in terms of clarity. My sake has a slight haze.
Filtration usually goes overnight so as to minimize sake lost in the filter canister.