Successfully replaced a (physically) broken joy-con using this guide with my 14yo. We were very diligent and took our time.

I think what helped most was using a sheet of paper and masking tape:

- we taped each set of bolts together, then onto the page itself. We then wrote notes next to it on the page

- we even went as far as to note which side of the ribbon tape was facing up/down to ensure we got it back together correctly

For us this was key because we had to take the joy-con apart to determine which part we needed, then had to wait ~ a week for the part(s) to arrive

A great parent/kid project - since they had incentive to fix the thing and save money/environment