Yoyos aren’t modular like other products can be. There’s some with side effects, swappable rims, weight rings, bearing options(SPR’s, different shapes), response options(stock, flowable, red/blue, rings), but not a true “pick and choose” type process. It’s just not practical and not reasonably priced to make a reality.
It’s a neat idea, just not practical. Someone said there was a modular yoyo, but it screwed together and was vibey.
You can do quite a bit with your yoyo. Depending what you buy, you have options. With some ONe Drops and Anti-Yo and Twisted Strings, you have side effects. Some give you weight rings(or you can add some). Bearings can make a big difference(some with argue differently). Response systems can alter some play aspects. After that, there’s modders who can do other things. Honestly, this is a better way to go anyways.