I've had a couple of people have been interested in using BoardOff for boards longer than 140cm which was the previous limit. In the latest update of BoardOff the drawing part of the worksheet has been changed to a maximum length of 180cm.
While it still solely for twintips the longer drawing area might make it possible to start using it to design surfboard outlines. Initial I am thinking of making it a bit of a work-around by superimposing the top and bottom half of the boards - you could do this now by designing the left and right sides separately exporting and merging the two twin-tip decks to form the whole thing. I'm thinking up ways to make this a bit easier.