Hi guys,
Some more questions on espresso brewing:
1. I extract with the exact same parameters every time (20 dots on Helor, 10g bean weight, 23s extraction) but I notice sometimes there is a "water puddle" on the portafilter after extraction. Did some research and it seems to be because of too little powder and I should put more. Why is it that I don't get that puddle sometimes with the same weight then?
2. My parents like to drink weaker coffee. Is it then recommended to let the extraction run longer to reach desired volume (e.g. 100-150ml), or retain same volume (60ml) and add hot water instead? Feel like the former is less of a waste of the beans, even though the latter sounds like the "correct" way of doing things.
3. My tamping is still horrible at this point in time. After emptying the powder from my Helor to the basket, I knock it on both the sides and underneath the basket to even out the powder, and I use a calibrated tamper thereafter to apply even pressure parallel to the powder. Lastly, I gently lift off the tamper to prevent any "suction" from destroying my tamp. However, it is still noticeable that sometimes one side of the spout flows slower than the other. What else should I take note of to get the best tamp? Have watched a dozen youtube videos and still not getting it perfect.
4. As my Gaggia Classic does not have the backflushing function, what else do I need to do to keep it running for many years? I will always run hot water through the wand and shower screen, clean them after each use.
5. Anyone knows of any roasters selling 250/500g beans in the North area? I have tested a few different brands so far and it seems I can't really differentiate among all the beans, so I'll likely go with the lower cost versions.
6. Also keen to know the same for Chinese coffee beans too. If I want to play with chinese kopi and the sock, how fine should I be grinding them on my Helor?