QUOTE(dwRK @ Apr 1 2020, 11:39 AM)
my general observations...
1) maybe let your grinder settle down...dun take it apart for cleaning for a few months so the burrs can wear and realign...
2) you trying to keep yield constant 40g for the longest time, now 44g... i never do this...prefer instead to stop on "degree of blonding"...this way i "know" how much "COFFEE" has been extracted...not how much "WATER" has passed through... my coffee may end up sometimes ristretto sometimes longgo...but amount of extraction is about the same...so the taste is very consistent just sometimes more intense or diluted... running a shop is different because customer may ask or ristretto or longgo and you have to be able to adjust and deliver on the yield and taste
3) your coffee is sometimes sour sometimes bitter....so probably means is not a temperature problem per se...because cold==sour...hot==bitter...you just need to be more consistent...hard to say also if the bitterness its because of over extraction... you can do a temperature test to see how hot is your water
4) forget about studying the wet puck...puckology is useless...soggy or dry depends on many factors including types of bean and roasts levels...i got beans that always give soggy puck...1 tiny dimple does not mean channeling... clue to channeling is easy....just observe how fast the coffee comes out during the first 4-5 sec... it should just start to drip out...if you get quite a good flow you have channeling, or grind too coarse, or stale beans...
5) forget about getting a new grinder for now...

6) baskets are designed for certain range of doses...so big baskets need more coffee...
so for you to try this new 14 days...
dose as high as your basket design/allow...adjust grinder for 25-35 sec pull...learn the associated blonding color vs tastes...once you get consistent taste...then you can slowly adjust to get back the desired yield...playing with dose and grind
hope these helps and good luck
Hi dwRK, thanks for your sharing.
1. ok, will refrain from adjusting taking grinder apart from now to let it aligns itself.
2. The initial thought was dose yield ratio of 1:2. I don't see why I can't make it to 22g:40g. Yeah, why not if getting more concentrated taste if that improves the taste. Actually am opened to explore taste.
3. I can understand temperature factor to taste profile, but not practical to me yet. Can see that it fluctuates and reheats from time to time, but i haven't been able to see and control it with my Oscar. Any suggestion how i can do it? I guessed I can't use this thermometer (pic) as the sensing is just not fast enough, i reckoned. I used to use it while heating up milk back to the time I brewed with French press.
4. Agree. Puck is the part that made me feel messy / uncomfortable, but I can still live with it and try to make it better along the way.
The first drip usually happens at about the 5-6th sec. I haven't been paying attention after that because that's the "moment" I would usually take out milk from fridge, pour into pitcher, and taste the milk with a small tea spoon (sometimes I bought spoiled lactose free milk) to get ready for milk frothing.
Will try to adjust this procedure to check on the flow of the brew.
5. Sounds good

6. This basket is meant to house 18-22g, I supposed I am putting it to its limit.
Your analysis plus the the sharing / guidance from the few other friends in the forum are quite inspiring to me. I do get a better idea and direction on what to do and what not overlook. Thank you to the all of you.
This post has been edited by MyHobby: Apr 4 2020, 11:59 PM