Warning 1: The carriage won't fit Prusa printer (it's 1.5mm longer). Use the original one. The fan duct, however, should work for Prusa as well.
Warning 2: Use "A8_Stock" carriage if you have the stock Anet A8 frame. You'll lose about 2cm of printing area along X axis.
Warning 3: The carriage is supposed to be used with LM8UU bearings, IGUS bushings will get deformed by zip ties.
Added small "ears" to fasten the cables to with zip ties.