Let me explain my situation first. I had a Wii whose disk drive refused to read dual-layer disks but the warranty was void (don't ask) so I couldn't send it in to be repaired. Because of this I purchased a new Wii and I want to do some softmodding on it. It has System Menu 4.2U and a serial number prefix LU70- a very new model, I believe. I successfully installed the Hombebrew Channel on it and now I would like to install some wads through wadmanager; however, when I tried to install a wad I encountered an error that I can only bypass by downgrading the IOS. So here's where my concern comes in: I don't know whether it is safe to make changes to the IOS with a LU70 Wii on a 4.2U. Can anybody help? It would be greatly appreciated.