At the moment I am using a fan resting on my print bead to cool my prints(I will get round to making a nice ducted cooling fan mount some time soon im sure), however this is an improvement on using duct tape.I am sure there are many other uses for this kind of stand.The openSCAD file is parametric but uses my fan holder library (http://www.thingiverse.com/thing:18273)so will only support the sizes defined in that, these are 25mm, 30mm, 40mm, 45mm, 60mm, 80mm, and 120mm.Use the openSCAD file to generate STL's of the single parts or a print plate (120mm will be too big for most machines as a plate. Simply select a fan size and a thickness dimension.The part will require some (not much) fettling before they can be pushed together. Glue if required.