When a composition isn't working out (see below) I usually start with a new file and group the major elements together before moving them over in three or four large clusters. I can move these around independently and find a more pleasing position without being distracted by the stuff I already know doesn't work.

Its getting late on Sunday and I don't want to work tonight. Maybe just a little light sketching and a spot of TV.

This one is not so far from finished now, just a little more detail on the rear suspension and engine/transmission as well as some engine parts shooting out the back, and some pinstriped flames, and a little more smoke, and maybe some splatter, and perhaps......