All Steel Machine Build- I want to know your thoughts!

Hey, I am relatively new to these forums but just wanted to post my completed, all steel, cnc router. work area is small (20 x 16) is small, due to my space being limited but i think it will suffice for most of my needs. The Z axis throw is 6.5 inches and i am using 420oz steppers, 2 on X Axis, 1 on Y, and 1 on Z. Please let me know if there are any glaring future issues that i cant see and any overall thoughts on the design. I'm not sensitive, so lets hear the truth! I am working on a dust shoe now and a mdf spoil-board and some other little accouterments.