Hey Andrew, thanks for the kind words in both of your comments! To the windscreen problem for 7-wide trucks: of course, you can "surround" the problem like I did on the cab-over semi. But what I´m gonna try on a future model is the following: using two clear-transparent 2*1 panels (2 bricks high, two studs wide), placed sidewards, subdidivided by a thin plate (2*1 studs) and borded by the same plate on each side - that makes a six-wide front shield. Next step: adding one shift of transparent plates/tiles to the sides to extend the windscreen further back. Then you should be at a width of about seven studs! Not sure yet how to most effectively fix the whole thing, though... Or, check out Ralph Savelsberg's awesome cab-over semi:
http://www.flickr.com/photos/madphysicist/3857196008/in/set-72157607099231255/
I´m not sure how he actually fixed the shield - I´m gonna ask him...
Kindest regards,
Steffen