Im trying to eliminate backlash in my cncfusion old deluxe setup. The first thing was to replace both of the lovejoy couplings with the slightly more expensive aluminum no backlash couplings. Worked great, especially for the x-axis which was toast. The next thing Im at are the preload nuts. How much backlash can the nuts eliminate. Would it be worth it to replace the stock thrust bearings that the kit uses to support the screws with something nicer. Similar to what mrm mcmodels did. The ones he purchased from mscdirect are what I am referring to. What difference would that make in the operation of the mill. Any other suggestions. I am not willing to spend the money to replace the screws and ballnuts, so what else can I do.

The ballnuts are already preloaded with larger balls.