>>1884827>I've got a Shimano quick link chain, can I reuse the quick link or do I need a new one if I detach it.Officially no, realistically yes. Unless it's the shitty kind like pic in which case just replace it to get rid of it. Links from other brands are reusable sometimes, depends on what speed the chain is.
>Also what do you think of ultrasonic cleaners to clean chain/cassette?Overkill but probably work good.