got a microswiss all metal hotend kit. best upgrade yet hands down (maybe the glass plate was close).the nozzle temperature is so much more consistant, which vastly improved print qualityit can maintain higher temperatures with an upgraded cooling fan, allowing me to run it faster and get better overhangs.(perhaps my favorite) it literally NEVER gets jammed when I change filament colors! Before I had to open the extruder up half the time, even after feeding in some filament to melt it. I have not opened the extruder once since installing it.Its a bit expensive, but totally worth it (note: I am in no way affiliated with micro swiss, just really happy with this thing)http://ift.tt/1WQ5T00 http://ift.tt/1ZPz4ju