Long-time lurker, but first time posting... I tried searching for other threads, but didn't find one with a definite answer. I apologize in advance if I missed it. I have a R4i 3DS with this Konami Digital Entertainment icon: My 3DS is 4.5.0-10 and the card works great as is, but I want to update it so I can actually use the eShop and don't want to lock out my card. R4IDS.cn says that any cardthat supports 4.5.0-10 will also support 5.1.0 directly. I just wanted to see if anyone else was in the same position and took the leap and had success. I'm leery about doing it because the last update locked out my old Rev C Dorosu card and I've had to relegate that one to my daughter DSL. Thanks!