I appreciate these are high level, there are other more detailed videos out there.
The intent here is to demonstrate it can be a DIY job if you know your way around a bike and handy with tool. Just planning, patience, care and time to complete.
Sound test I used Spectroid and tune to 100hz, not the easiest thing to do initially, but got there with a some adjustments and checking, testing, checking, testing, re-checking etc...