I would like to see what others are changing when you start a new bag of coffee. I will preface that I only do pourover.
I keep my ratio the same as well as my brew temp/# of pours. I really only adjust my grind size to aim for similar brew times and then from there adjust grind size based on taste/astringency.
I brew Chemex every day as well, and use the same strategy. I always brew to ~600g, and start with a 1:18 ratio for a brand new bag, as well as a set grind setting.
Moving forward I only really mess with grind/ratio honestly, and haven’t really been concerned with temp or time. Although I’ve considered setting aside a day to play around and see if I can actually taste differences adjusting more variables….
Totally agree on expense though, I rarely ever throw out a brew so always want to err on the side of caution
Yeah, temp should be 205F for most pour over applications. Shouldn’t need to fool around with that. I don’t let time bother me at all on the chemex, can take a while sometimes. I just mainly focus on keeping a nice even bed while I’m pouring.