So i finally purchased my dremel, and made some tests of both cutting and engraving. I havent used cutting disks yet, only the cutting tip.
The first thing i have to say is: man that thing is dangerous :) Use some safety goggles if you have to use it! The second thing is that it takes a while to get hand with it. At first it just keeps going crazy and shooting particles of stuff around, with a particular aim for your eyes and face :P After some test i managed to make an almost straight line, and then i had some fun engraving stuff :P