Hello guys, I would like to ask something out of my curiosity and being new to R4 flash carts. I have bought an R4i Gold 3DS card from www.r4ids.cn and it works good on my NDSi XL v1.41U with the WOODR4 v1.54. However, I also have another NDSi XL which has different firmware having 1.44U. The flash cart doesnt work on the new firmware that my other NDSi XL has (1.44U). I have checked the website and check the upgrade patch section for flash carts. But before I would like to try patching my R4i Gold 3DS flash cart to 1.44U in order to make it work on my second NDSi XL (1.44U), I would first like to know if I could still possibly play it on my first NDSi XL (1.41U). Has anyone have experience the same kind of situation as of me having 2 NDSi each has different firmware. In addition, I don't want to upgrade the first NDSi XL (1.41U) because I want to make sure first that it will work on the latest one so I needed the old firmware one for back up just in case. So in short, if I update patch my flash cart to 1.44U, can I still used it on my NDSi XL 1.41U at the same time? Looking forward for any help.