Hello! I live in the Netherlands (Holland) and work with large PDF drawings (originally CAD-drawings). Paper size A0. These PDF-files are vector-based and thus very small in filesize (400Kb). Still when I open the files on the iPad, viewing (zoom and pan) is slow. I need to make annotations as a preparation to my buildingsite-visit, and when I'm visiting the buildingsite I want to be able to add some more annotations. I have to be able to save the annotated PDF and put it back on my PC. My best (fastest) viewing experience so far is with iBook, but I can't place annotations with the iBook-app. ReaddleDocs works fine with text-based PDF's but panning within a PDF-CADdrawing means I'm often confronted with the chessboard-background for several seconds (the app is probably loading the vector-info during those seconds). With iAnnotate I have the same experience (often waiting for the app to show me the next part of the drawing). What (fast) app should I try next?