For low acid, full body nothing beats Indonesia IMHO. But they can also be earthy, smoky, and sometimes funky. I have been enjoying super chocolaty, sweet, syrupy Vietnamese coffees lately.

atikhon wrote:The video appears to be using a variation of an Osmotic Flow technique, which is unique and seemingly popular in Japan (I know some of Cafec's filters are labeled "Osmotic Flow"). I don't understand what science may be behind this style of brewing, but I would presume this brewer may be designed with that in mind. In my limited understanding, osmotic flow brewing utilizes a narrower column of water flowing through the bed, so a narrower/taller bed might be advantageous.

Back in my day we just called it a center pour, and we liked it. We didn't ascribe any special osmotic abilities to the technique, though.

If you are a back palate coffee drinker like I, and enjoy a heavy bodied, chocolaty cup, then give Len's Coffee in Medford Mass a try. He specializes in Vietnamese blends, but many of his roasts appeal to me. Have not tried his Sumatra yet, but Timor was on the brighter side with a good body and sweetness, very good. I love his Chocozilla from Brazilla! blend. The chocolatest coffee I have had. I got greens from him, so I roast my own but his roast is better. I am into funky, smoky, earthy, bold cup, so his Barako blend was the game changer. Better than Aged Sumatra I roast. But he is out of Liberica, so Barako blend has been out for a while.

Just be careful on his JAZ Improv lines. While they may appeal to some coffee drinkers, most of JAZ and a few other blends he sells are flavored. The label and description do not indicate the artificially flavored contents clearly.

Also, if you sign up for their news letter, you get notified of their frequent sales with deep discounts. $4 TryMe on 8oz bags was fantastic deal I used to try many of his roasts.

Just for information. I just tried the "Osmotic Flow" technique brewing using a Hario V60. I used the v01 dripper with 25g of med-coarse (6M on Vario with ceramic burrs) Nepal Mount Everest Supreme bean Medium roast.

The top of the coffee bed with 20g grind in 01 dripper was not high enough. Even at 25g, the top of the coffee bed is still over 1.5cm below the rim of the dripper making it very difficult to drip onto the center without disturbing the bed. And pouring onto the center only took over 10 min to drip 250ml. I tried the coffee at that point, but it was very bitter, so I poured more to the final 300ml, 1:12 ratio.

It was a very uninspiring bitter and astringent cup of coffee, unlike the exceptional cup I just had using the same beans a few days ago with 60g in 1000ml in v03 Hario V60 without using any particular pouring technique. I will play with this Osmotic Flow technique a little bit more, but my initial impression is not good.

OK, the DEEP27 just arrived from Japan. I brewed the same Nepal Mount Everest Supreme bean Medium roast as before for the V60 but adjusted the dose to 20g (instead of 25g in V60) of med-coarse (a bit coarser 7M on Vario with ceramic burrs as compared to 6M in the previous V60 pour) and 300ml (1:15) water as I did for the "Osmotic Flow" technique brewing using a Hario V60.

The 20g coffee did not fill the brewer all the way to the rim, so it had plenty of space to let the bloom rise and do the center pour (aka "Osmotic Flow"). With a smaller dose, coarser grind, and now in DEEP27, deeper but narrower coffee bed, I finished pouring in ~5min (including 30sec initial blooming).

Well, the cup was much better than the last V60 Osmotic Flow. But I can't say it is better than other pouring methods I have used with this bean. I noticed in the cup more body and less acidity (both of which I prefer) than the best cup I had brewed with this bean. But it also had more bitterness and less sweetness which I did not like. There was a sheen of oil on the surface of the cup like I had brewed it with a French press. I have never seen this in a cup with a Hario filter or Aeropress filter. Does the abaca used in the Cafec filter let the oil pass through? I have never used the Cafec filter before for V60, so I really can't compare it against the Hario filter.

In any case, for the first brew, it was OK. I need to dial in to get better at brewing more sweetness and less bitterness. This brewer is not going to be the easiest one to use for me but will be fun to play with.