I would like to share how I open fishing reels and remove their parts and close them.
Please be careful if you want to open your reels and close properly. Because, it is responsible for you to overhaul your reels properly.
if you want to open your reel, please buy a cheap used model and used it for a practice.
For example, Shimano 1000 is good model for practice. This is because, most of Shimano reels have almost the same architecture inside of its reels. so, it can be great to learn the reel.