You will hear good and bad. I've been on mine for two plus years, three to five days a week and I've never once had an issue. I've never even had to open it up.
Also, make sure you have the Klyte version of the frequency G, and yeah if you have a whole bunch of axle sticking out why not trim it off? They make alloy axle nuts and alloy dust cap and Ti axle for the regular nankai, which could really help out. Is it the 3/8 technolite or 14mm bamboo that you have?