Control Parts for Second Build

So I decided that I should invest in some new bearings, shaft collars and couplers for my second machine. Purchased some pretty basic stuff, Lovejoy couplers one side 1/2" the other 1/4", 1/2" shaft collars for the lead screws and some 1/2" ID bearings for the 3 axes. Bearings were from Ebay while the collars and couplers were from McMaster Carr; in all I think I spent around $35 for everything.