I was thinking about making a mastodon-twitter crossposter when I came across this.
Its much better and easier to use than anything I would've made.
Been using it for about a week and I'd say its been a success.
One word of caution. If you decide to use it please be active on both sites. If your just constantly posting into the void without ever interacting then why are you even here man?
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!