I watched a regular 3ds tear down video on YouTube and it was over an hour long now more than double that for tear down and putting back together then double it again if you are doing a MB swap so you are looking at a good 4 to 5 hours at bestYou have no idea how painfully difficult it was for me to get some of those ribbon cables reinserted. They keep everything super taut in the OG 3DS.
And the video cuts away at some parts
I was considering it but then I said no thanks not worth the risk
