I know ball screw whip has been discussed before but...I'm planning to use a 58" from fixed support to free end support 1610 ball screw from linearmotionbearings on ebay and just wanting some feedback. I'm hoping to get 300in/min at least but not too optimistic judging from nooks critical speed calculator. I really don't want to use 2510 due to space constrictions. Any thoughts?