I'm a dinglespeed rider and considering building up an Alfine 8 for a long tour with some bikepacking. Is the hub actually an efficient direct drive in 5th gear? I'm assuming if I ran 32-20 gearing (which I use now) I could still climb and ride trails in 5th gear and, with the exception of the extra weight, still be as efficient as I would be on a freehub. Also will the hub have less stress on it with power used in 5th as opposed to other gears. Thanks!