If staying with the 7-speed, add 5mm spacer to non-drive side only, then redish the wheel.
If moving to 8/9/10 speed freehub...
Distance from Spline Stop to the end of the drive side locknut must = 40.5mm. (That's required)
Rest of spacing efforts is on non-drive side to finish the 134.5 to 135.5mm OLD spec.
And there's no such thing as a no dish / zero dish wheel - so don't event try to play the spacing balancing game. That's a gimmick.
=8-)
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5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life