I will be working on a friend's system this weekend, and he has a brand new black 4.3U Wii. He wants homebrew enabled. I've modified several 4.0/4.1/4.2 Wiis with successfully with just about everything. From what I can gather on several forums and several posts, the Hackmii installer, Priiloader, and other critical things haven't been updated yet. But using SSBM stack exploit, I could load up loadmii and then load MMM, replace IOS41 with an older version, then use the TBR, and from there I could downgrade the entire system to 4.2 or 4.1. Is this safe to do? What would the process entail?