Here are the steps to align the lead screws on your gMax printer. This may need to be done from time to time as part of general maintenance or if you are starting to experience binding issues while trying to move the x-axis arm up the z-axis.
The bolts in the nutblocks and the lead screw holders may be difficult to loosen. They were coated in locktight prior to shipping. You can reapply locktight if you like, but it is not necessary.