most 3d printers cannot print nylon witout modification due to the high extrusion temperature required. also, nylon really sucks water out of the air and then the water boils off when printing which makes the prints porous and crappy unless you keep the nylon in a dry container even when printing. i'm planing on using asa and possibly abs depending on how difficult printing with those materials is. i'm just waiting a couple weeks for the temperature todrop so i can keep the windows open when printing with those materials.