This one too: (corexy CNC style):
I’have a Smatrapcore wood (I totally redesign it, because there are some mistakes on the original design: belt touching himself in +Ymax, misalignment of the belts, etc. I use the Andreas’Z axe add-on and the top beast extruder Gunstruder ( http://www.thingiverse.com/thing:1247952 ). The main problem is the noise: don’t use plain board to make it, it’s really noisy! I drill big holes everywhere and now it’s a lot better. But for a really cheap ‘second’ printer, I admit than my prints are really clean (way cleaner than all prusa-style printer I saw).