Mike,

Welcome to the forum.

No way is that expected. It should be dead straight with no perceptable wobble. What diameter is the screw?

The first test is to disconnect the driving nut from the carriage and check that the carriage runs on the slides cleanly end to end. If it does then either the leadscrew is bent or its not parallel to the slides. Alignment of the latter is a case of loosening the bearing blocks and tapping into alignment while running the screw back and forth.

I'm guessing MDL is Marchant Dice Ltd?