So my initial comparison of the One Up to a Cupcake was truer than

3D Printing
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So my initial comparison of the One Up to a Cupcake was truer than I initially realized. I’m getting a significant Z-wobble, and looking more carefully, I can see that my threaded screw has a significant bow to it.

Now, I’ll have to “read the literature” to see what past solutions, if any, might be applicable to this design. I suspect none will actually work in this context.
http://static.squarespace.com/static/515dff18e4b0daad6e7b88e2/t/52bcd333e4b00e15437a7346/1388106551586/IMG_0763.JPG?format=1500w

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Man, QU-BD just dont seem to want to change, they clearly have a bunch of ideas, a competent PR/marketing person but their QA and customer service still seems to be broken. Just my opinion anyway.
On a more useful note, here is a way to straighten a shaft:

Should work just as well with screws, you’ll just need to protect the thread.

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Incidentally, you can also use that old method of having the lead screw nut retained between 2 plates so it can still move in the X/y plane, thus any wobble doesn’t get translated to movements in the x stage.

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@Tim_Rastall Is there a picture detailing what is meant by: “having the lead screw nut retained between 2 plates”? I may want to incorporate the idea straight from the get-go.