I would recommend having a certified dive shop do the rebuild. Not that you’re not capable of doing the work, but from a safety factor; dive shops get updated information directly from the manufacture. They have the proper torque specs, recall information, specialty tools, etc. Sometimes you can have two o-rings that look identical but one is correct and the other is not.
Also, I’m big on supporting your LDS. Dive shops depend on getting paid to sell and maintain equipment for divers. This is how they feed their families. And we as divers need the shop to stay open so we all have a place to support our diving addiction for years to come.