Important thing, the vote tomorrow is by the Council of the European Union (not to be confused with the European Council) not the European Parliament, so this time around it's not the MEPs you want to contact.
See https://www.patrick-breyer.de/en/council-to-greenlight-chat-control-take-action-now/
@ansuz @xinayder
Err, it's not the actual Council vote, it's a vote in the Committee of Permanent Representatives, which prepares the agenda for the Council. I shouldn't multitask...