408- sorry brother that looks awful. u gotta read the new to graff thread. start simple, just like the letters on your keyboard stay uppp.
stus- i like the guy with the mustache
zarb- ur gettin much better. try and work on the bottom left of your L where u connect the whole letter. the top of the S looks too big and the width of the top of the A should be a little bit bigger. work on proportioning your letters. ur 3d doesnt make any sense either but thatll come with practice.