A little background first. I have already installed A9LH on my o3DS and successfully copied my emunand data to sysnand. Everything ok there. Now I want to do the same with my N3DS but there are a few differences with my N3DS. My N3DS has a clean 9.2 Sysnand and a 10.7 Emunand with Ambassador titles (I did a system transfer from my o3DS Sysnand to my N3DS emunand). So, I read (here and here) that if you have ambassador titles it can cause and error after downgrading, that's my main concern because after the downgrade to 2.1 I cannot check if there is an error until after I have copied it to sysnand. In order to avoid any potential (and unnecessary) brick, is it enough to Tinyformat twice (as indicated in Plailect's guide) or should I do a standard system format for my emunand? Also, I was thinking that it could be best to just make a backup of my emunand and use my clean 9.2 sysnand to make a new emunand and start Plailect's guide from the beginning. But regarding this, I was also wondering if that ambassador thing could mess up something when I try to dump CTRNAND partition and inject it into sysnand (which doesn't have the ambassador titles). TLDNR: I want to downgrade my N3DS to 2.1 to get my OTP but I want to know if the ambassador titles can cause any problem with the downgrading process. As seen here and here. I hope someone has experience with something like this and sorry for my bad English.