The A9LH install process is super quick, and it actually doesn't matter whether or not you're on 2.1 sysnand or not. I also don't think anyone's going to close the lid during such an important process (even though that section should only take less than a second)The biggest issue I have with this process is the fact it installs A9LH in 2.1 sysNAND. This can't go right as you can't even close the lid as n3ds user or you will brick.
