BMatthews

Some careful measurement would need to be done to find where the source of the error is loacated. If it's that a whole page is just too small then scanning in the parts and expanding the image to produce correctly sized parts is one option. If the scan of the master plan slipped and there's a foreshortened "band" running down a page then scanning that area into an image file and separating the foreshortened part and stretching it to the proper size and then joining up the good parts on either side again would be an option.

Or there's the option of just re-drawing them over to make parts that fit.

Andy of these is obviously a lot of work. Correcting things such as this is seldom an "easy" fix.