I bought a new rim and spokes to build a new rear wheel. They calculated the spoke lengths and gave me two different length spokes: 293 for the right side, and 295 for the left side. However, the two spoke lengths look the same size when I stand them up next to each other, and they both seem to measure 291 from the tip to the inside of the elbow. After building the wheel and screwing the all of the nipples down to the point where the thread ends (but not yet tightening the spokes or truing the wheel), the rim appears to be centered on the hub part, but is obviously not centered on the axle itself.
Is it okay to center the wheel with the spokes I have and proceed to true it after that, realizing that if my measurements and observations are correct then the right side spokes will need to be tightened more than the left? Or do I have to take it apart and take everything back to the store and make sure I have the exact correct spoke lengths and start over?