Fleafa has reccommended Hexagon, which Ill download and try out later this week, "free" is a price tag I can work with..
I have no problems with "blender units" as its pretty easy to set one blender unit to equal one millimeter, its just a pain when I want to measure somthing or easily enter exact proportions.
I know there are lots of vids, Ive watched a few and I think if I spend 10 hours watching vids and following them step by step, I will get good at it pretty quickly.
AH