D22 - Concept Groud Speeder

Since I'm on break, I have a bit more time to do some sketching, so I worked on this on and off most of the day.  It went through a few revisions before i settled the on the final look.
I want to be able to get this quality of work but cut my time down to around 30-45 minutes.

Just gotta keep sketching! 

Time: 2 Hours
Wacom Intous 4 Med
Sketchbook Pro 6