I want to install a9lh in my n3ds but i´m not sure if is safe as how is my n3ds right now i have 9.0 sysnand with downgreded options for the installed mset, i dont even use it anymore because i have installed menuhax and coldboot but never unistalled the mset , so the question is can i just do the a9lh process as i am right now or do i need to unistall the mset first? if so what is the quickest and safest method?