Bulldog XL extruder from http://www.reprapdiscount.com modelled in OpenSCAD from physical measurements.I am not the original designer of the Bulldog XL product so any internal construction and dimensions are approximated. Outer dimensions are as good as I can measure with calipers,Suggested use is as base for designing mounts, fan shrouds etc.(The code is not as pretty as I would have liked and comments are sparse but as the model served its' purpose when designing a mount/fan shroud I'm not sure when I'll return and clean it up. Lame excuse but it's better to be realistic and just put it up if someone can make use of it)