Mepxy Marker drawing: grey scale practice

Hi!  I used my cool grey marker set this time for this pic.  It didn;t turn out as well as I would like.  I missed the mark on this one I feel.  Still, it is a nice drawing.  Monochrom is hard when it comes to realism, I find! 

Busy day at work today.  Been going a bit flat out.  Can't be helped.  There's a lot to do.