I did my conversion with ACME (actually the metric equivelent), and am just in the process of designing a ball screw conversion as I am not the pleased with the wear and variable backash with the current set up.
I'm using a Phase II AXA tool post on a plynthe without the compound and fina good match to the CNC conversion.
Make sure to address a swarf guard for the Z screw.
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Regards,
Mark
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