Yes, voting with 100% of your power and adding additional weight will also work as a "checkpoint" for updating boost. This is because when you vote with 100% of your power, you are essentially creating a record of your opinion and adding additional weight to it. This record can then be used to measure the overall sentiment of the community and help inform the decision-making process when it comes to updating boost. Additionally, when you add additional weight to your vote, it can help ensure that your opinion is taken into account when the decision is made.