The Prusa i3 was one of the best reviewed 3D printers of the past year, and we check out their newest upgrade that allows for 4-color printing with just one hot end. Sean chats with Josef Prusa himself to talk about how multi-filament printing works and why its no easy feat. \r<br>\r<br>Shot by Gunther Kirsch and edited by Norman Chan\r<br>\r<br>Subscribe for more videos! \r<br>Follow us on Twitter: \r<br>Get updates on Facebook: \r<br>\r<br>Tested is: \r<br>Adam Savage \r<br>Norman Chan \r<br>Simone Giertz \r<br>Joey Fameli \r<br>Kishore Hari \r<br>Frank Ippolito \r<br>Sean Charlesworth \r<br>Jeremy Williams \r<br>Gunther Kirsch \r<br>Ryan Kiser\r<br>\r<br>Thanks for watching!