Cross-post you Toot directly from Mastodon to Twitter, aka Birdsite? *Easy* with browser extension.
* Firefox one here: https://addons.mozilla.org/fr/firefox/addon/birdsite/
* Chrome if you prefer: https://chrome.google.com/webstore/detail/birdsite/lfmfhaopllgidldpmifdcjdckdggdjaj