Hello I wanted to swap my New 3DS XL screen that is dual TN with IPS screens from a Japanese New 3DS XL that I bought from ebay. I paid a professional to swap the screens for me because I don't think I can trust myself for the top screen part. So, I was wondering if it was necessary to install CFW right now, because I am aware of the screen calibration and HWCAL settings. Or can I do this process after installing or do I have to do something beforehand sending it in for the service. I need someone to help me walk down with these steps.