I'm still building my first cnc machine...a 5' x 10' monster... it was only supposed to take, oh- 3 months at the most- HA !...2 years later and 75% percent complete (scrounging up parts from junkyards and industrial trash takes time and luck ), I often wish I would have started smaller, say 2' by 2' ? If so , I would at least have a little cnc machining under my belt by now. So I say this to all fellow newbies... Start small and enjoy...