I got my printer from GrarBest also .... There is no way I can level the bed. I have added the Ultrabed and made the adjustments to true the rods in their holders. Still I can never get the bed level. It seems that no matter what I do the left rear corner is always jammed up against the nozzle. Also I have a granite counter top that the printer sits on and there is a >2mm wobble.... it just wont sit flat. I wonder if the chassis is bent. I also have contacted Anycubic with my concerns .....and pics. wish me luck!