to make a CCD that big to scan a whole document is going to be enormously expensive for very little benefit . Yeah that would be overkill . I was more thinking of two or three scan heads to reduce scan time from 12 to 6 or 3 seconds . Pretty much all of the problems with it are solved , so why risk starting a new paradigm for little gain ? Sounds likely . Though the difference wouldn ' t be that big with two identical scan heads on one rail , it is not a new method of image capture . But maybe still not worth the investment for the reasons you describe . <| sep |> 6821 Southpark the stick of truth ! Thanks again for the giveaway <| sep |> I didn ' t think it was spoiler hit boxes that made some cars have the special ability of protecting you from gunfire from behind . I thought it was cars with those slats across the rear window . Example . My bullet has no spoiler and I can ' t be shot from behind because of the slats .