@BuZz I already own a Rpi3 but as C1 is more powerfull i wanted to give it a try. I Already tried Lakka once but it misses the emulationstation front end and there lot of tool missing compared to RetroPie
I only wished there was an already build image for C1 like the one for RPI but it appears to be in my dreams.
So i'll stop posting here and open a new thread with the proper information.
Thanks for helping me it been beyond my expectation so far :)