I've used a Minoura to build 4 wheels. It works fine for the money, you just need to take your time. "Self centering" is a dumb bit of marketing...you just flip the wheel on the stand.
The problem with the Minoura in this regard is the fact that where it holds the hub is round...not "v" shaped, and plastic. I've found it makes accurate dishing very painstaking and mistake prone work without a dishing tool.
But, overall, I've been happy, and the wheels all came out just fine in the end.
Funny thing about Nashbar...they used to sell all kinds of things for all kinds of great prices. Not as much variety anymore, particularly in items that "mere mortals" like me need on a regular basis. Certainly not the same prices either.
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Good night...and good luck