i've only built front and track wheels, and haven't had to deal with building up a rear road wheel and am running into a snag when it comes to spoke lengths for the rear. I'm building up a new dura ace road hub (32 hole 10spd 7800) onto velocity fusions and am trying to get the spoke lengths. Spoke calc (http://sheldonbrown.com/rinard/spocalc.htm) says 289.1 and 287.5 for 3x. so my plan is to order 290 (oddly enough, the size i need to order for my front wheel) and 288mm. I'm just unsure if this is correct and if anyone minded doubling back on me that would be very helpful. sorry if this is repetitive or silly, just asking for some help.