i3-box evolves: fully configurable bearing dimensions coming
thats lm12euu, lm12uu, lm8uu, igus GFM 0810-10 and something that will not hold 8mm bronze bushing because I forgot it has a flange 
I’m a newb to 3D printing, and I have no clue what I’m looking at, perhaps some one could explain? feel free to talk to me like I’m um…13? no 10?
@Kieren_Baillie Well, in a 3d-printer, there are parts that slide on a smooth rod. The yellow/green things are pieces of those parts, the gray barrels you can see here are bearrings, and the gray barrel insire gray barrel is that smooth rod.
The i3 is a 3D-printer design that is parameter driven – you can decide if you want one that’s larger or small, one that uses metric parts or SAE, and now, what size/type of linear bearings to use. Once all of the constants are set, you can generate all of the models for the printable parts and (presumably) a part list for the ‘vitamins’ (eg: nuts, screws, rods, motors, etc.). See http://reprap.org/wiki/Prusa_i3 for more details.