I bought a PM-30MV machine used it and decided it needed a DRO or for around the same price a CNC conversion. I chose the CNC conversion, more so just to see if I could do it.

I have ripped my machine down and cataloged all the parts and am ready to start upgrading the machine. I ordered the DVD from HossMachine to give me a base line on the stuff I need, since i have never attempted something like this before, the fabricating of the parts is no big deal, I'm worried about ordering the right parts, electronics and ball screws.

Right now I am stuck looking for answers on the Bearings and ball screws. My PM has larger bearings than the G0704 so I found the same type just different sizes larger,(12x28x8-x/y)and(17X35X10-z), but the ball screws have me worried.

Should i go with the HOSS recommend screws or go larger, match the size in the machine, or go with HOSS recommendation. Will it make a difference? Anyone know?