Its an 83cm slalom which is a bit of a Frankenstein with bits inspired by this and that.
The final design is a development of this design I was working on almost 3 years ago - http://whitelionwindsurfing.blogspot.com.au/2012/09/board-building-project-hd-s82.html
HD Creeper 83 Cad Model - Perspective
HD Creeper 83 Cad Model - Plan and Side Elevation
HD Creeper 83 - Toolpaths
HD Creeper 83 - Mowing Foam
HD Creeper 83 -Foam Side