I successfully installed A9LH on my two n3DSXL by following Plailect's guide. I guess I got too confident or something, but today I tried to install it on my red o3DS XL, which was still on 4.5 for Gateway use. I updated to 9.2 without problems, and came to part 4 of the guide, downgrading to 2.1. I downgraded successfully, but the problem I encountered was that I couldn't connect to the dukesrg website to get my OTP as I forgot to make sure wi-fi was on before I downgraded. Realizing that, I went to the settings of 2.1 to set up internet connection (might not have been necessary, come to think of it), I switched on wi-fi, and when I came back to the home menu, I got a message on the top screen saying "arm11.bin" (just that, I think). The system froze. I forced shutdown, and rebooted, only to get double black screens. That's with the SD card in. If I remove the SD card, strangely, the blue led will flash a fraction of a second, and turn off immediately, as if I had A9LH installed (but I don't). I'm still on 2.1, and don't have the OTP.bin file, as I checked on the SD card. The contents of the SD card is what it should be after preparing to get the OTP (part 5 of the guide). Any suggestions? I think I'm headed toward a hardmod, right? Good thing I have all those NAND backups to choose from.