Sorry to hear about the Pronterface issues, Pichuete. I'm not familiar with that software - I'm planning on [trying to] install Repetier-Host/Slic3r on my i3v when I get it...hopefully that won't open up a new can of worms though. I've actually had a lot of good results from R-H/Slic3r on my Printrbot Simple over the past year. With luck that software will run on a Rambo board as well... (If anyone out there has done this I'd like to learn about your experience...)