Sound advice.

im trying to build as controlled and tight as possible, but this is a learning machine and never having seen one up close, I have no idea of speeds, acceleration, deceleration forces etc so maybe it will work wonderfully first time or maybe I will need to rebuild bits of it.

one thing I am surprised at is how difficult it is building small - every millimetre of axis travel counts and things keep getting in the way - gantry mounts, trolley brackets and so on.. Building a nice big table would have been much easier but I have nowhere to put it :(