Hi Mattia,
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I'm replying mostly to bump up your sensible query in case it gets overlooked.
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Based on the size of your machine 2510 ball-screws would be far heavier than ideal or needed IMO.
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I would be thinking of 1610 or 2010 or even 2020 for this size machine, but hope someone with proper knowledge comes along to answer you soon.
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It always helps those replying to threads if you're able to post images or plans.
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Good luck from down under,
Andy