I just got a Kobo touch and I didn't like the Kobo software so I am using Calibre. Now, when I try to add a .mobi file to my ereader calibre wants to convert it to epub which kinda messes with the margins. I know the device supports .mobi and if I manually add the mobi file the reader can see it. I want to use calibre to keep things neat and organized for myself but don't want the files to be converted, is there anything I can do? I'm sure I'll be giving myself one of these

when someone points how to do it, thanks in advance for the help!