I understand the locknut being needed on the knob. Not fun to see a knob laying on the table underneath the printer! I finally got all the bugs worked out and the printer is running like a champ.I was getting some y axis drift and looked into checking the voltage to the stepper driver but the new improved anet 3d v1.7 board doesen't have but one adjustment pot. The new fiberglass reinforced belt had arrived so I installed on the x and y axis and poof, all shifting gone. I switched on the manual auto level and I am getting decent prints. Now is the hard part, learning cad to make my own designs and playing around with cura to make more refined looking finished pieces.
So altogether I have about $300 invested in this printer not including filament.