Thanks a lot for the responses guys
I'll try it with a metal grip, I'm sure that it must be a nice machine. At the moment I want to use it just with regular needles but I'll try it too with carts in the future.
Tat2dru these volts settings are with carts or regular needles? I just tried it in one session... It was a realistic work with tiny details (tiger face... Lots of hairs bla bla bla XD) and seemed to work nicely at 7.5 but of course I need more time with it