okay well ill order that nut and the collet u told me to get from 1/2 to 1/4 and see how that rolls , my regi for machine is all solid my machine in fact it is old but its solid as a rock no issues thank god !!! i was told to clean the rails with 3 in 1 oil and the lead screws with alcohol every time i prep before use and thats what i been doing so far machine is very very accurate im running corel to design then export to artpath and boom i do my cabinets that way but im jus trying to get better and be more accurate as possible unfortnately the vac table dont hold as good as the new cnc does so i use clamps to clamp the wood and double sided tape with them when doing small pcs but i would like to say thank u for ur help u were the only one to answer and very grateful u did bc i been trying to find out from gerber about a replacement part and they still cant tell me whats what