My take is don't add bar tape till the end. What I like to do first is to set the bar up to where its most comfortable while riding in the drops. Next is to move the brake levers to a spot where they sort of level. Then go for a ride to and do minor adjustments to find the most optimal location for the most comfort. Before taping you might want to check the location of the levers by either measuring them from the bar ends or looking at the marks on the bars if they print them there. Next adding or subtracting spacers under the stem is another trial and error kind of thing. Comfort is king...