KAZ - throw is a lot better, the a looks like an a now. the k could use a little more refining, but better for sure. As for the piece, id def. lose the extensions. you also have proportion problems...
CERT - yeah, man, much clearer pic. I think you have some little proportion problems as well, the e and r have skinny parts and the t and c dont really have parts the skinny... i also dont understand the r loop and think the leg should com from the loop, not the spine...
CUS - keep sketchin man, your 3d is off, so are your proportions, etc. good stuff keepin it simple while you learn, though...