I'm a keen scenery maker and I even sell some of my cast pieces on eBay from time to time, so having a tool that enables me to plan on a screen means less time wasting mistakes and printing out scale plans makes life a lot easier (I could print the plan straight onto card if I wanted to). The example below is an Epic scale Censorium, the sort of building that would be common in a city of the Imperium, if I decide to make a master model for casting, the plans will make life a lot easier.

When trying CAD before I found it confusing and returned to pen and paper pretty quick, this application however is really easy to use and i recommend it as total novice to this sort of thing.
Hope you all had a nice Christmas, next week I'll be back with some more conventional painting type stuff...