Ones you can replace the storage with a screwdriver are a safe risk, the soldering upgrades are a void warranty and something you are always best getting somebo

Ones you can replace the storage with a screwdriver are a safe risk, the soldering upgrades are a void warranty and something you are always best getting somebody who can do it in their sleep to do for you. Soldering is not as easy as it used to be, even the pros will not have 100% success and need to reflow or rework.