So I am going to buy soon a new 3ds system on 10.3.28 Japanese, and I would like to know if I can use the browserhax to downgrade as I read someone that had a problem with the japanese console, in addition I would like to know about the changing region from JAP to EUR does affect anything other than the eShop? Last but most important if install Luma will I be able to play different regions cias by deafult or do I have to use the emulation feature?