Thanks, I watched it. I like strong coffee.. I feel like the chemex overextracts and is bitter and overly clean. I am able to make a strong pot of coffee with a pour over no issues and a regular paper filter.
But I'll try his technique tomorrow. I probably have my water volume measure wrong.
If you want stronger coffee, use a lower water-to-coffee ratio. For example, the standard ratio is 16:1 water to coffee, i.e. ~300g water to 18.5g coffee. To make it stronger, add an extra gram. Grind size doesn't affect strength.