dishing on alfine hub
That sounds like it should work, although I would be measuring to the axle nut, not the axle itself, as the axle may not have exactly the same amount sticking out of both sides of the hub (likely not an issue). If the rim is dished to the right then your driveside spokes are too tight and/or your non drive side spokes are too loose. Give everything about a half a turn- driveside loosened, non drive side tightened- and see where it gets you. Also, are you using a spoke tensiometer?
Let me offer an alternate method of getting your wheel trued up without a truing stand which might make things easier for you. Take your wheel (no tire) and drop it in your frame with the bike upside down, or put it in a workstand if you have one. Don't put the chain on. Attach a couple of zip ties to the chainstays or seatstays and cut them short, but not so short that they wont touch the rim. you can rotate the zip ties on the stays to get the closer to or further away from the rim to gauge how close to true you are and you can slide them up and down on the stays to see how close to round your are. That is basically the same way a professional truing stand works. When you are close on one side, flip the wheel around in the dropouts and repeat the process until you're happy with the results.