I have an two Black cosmo first generation 3DS one on fw 2.0.0-2E the other on 9.4.0 21E. The older one's shell is a bit busted and the top screen has ceased to work. Can i gut the older 3DS and put its parts into the newer one? Are there any guides covering how to do this? I would like to use a Gateway 3DS card on my 3DS but the flashcard is locked out of 9.4 EDIT: https://www.ifixit.com/Guide/Nintendo+3DS+Motherboard+Replacement/6017 would this work?