The K3 Touch has a rubber flap as well. Actually, IIRC, on the K3, its kind of like an old "saloons" doors. Two rubber pieces, barely touching in the middle, and the coffee, "extrudes" through it.

In the K3T thread on CG, Seems some people took them off as well.

The rubber piece is gone on my K3 touch as I think I previously replied. I can get my finger all the way up to the burr and get literally every bit of residual coffee out with a couple of pulses.

GC7 wrote:I can get my finger all the way up to the burr

Don't try this at home, kids.

EDIT - Don't put your fingers anywhere near the chute while the burrs are spinning!

Any updates from users?

I spoke with a vendor yesterday and heard Compak is coming out w/a new version of the K10 doserless. Supposedly it will feature an improved spout, relocated timer(top of spout), and push button grinding activation(due to grouds jamming the PF activation). It will also carry a larger pricetag. I guess they are going to show it at the SCAA this April.


Cheers,
Jackson

That sounds interesting. At first glance(and second and third), the K10 Doserless looks like a grinder for bulk grinding into a bag. Like what the Macap MC4, and Mazzer "grocery" models are originally designed for.


But.. It seems for home users, it will suffer the same fate as the rest of 68mm conical group. Lots of purging for the first shot in the morning. And no chute will fix that, when most of the coffee doesn't leave the burr chamber by simply pulsing the grinder on/off. Now, the Nino's burr chamber.. thats a nice design I'd say.

Even my MXK, a 63mm conical, holds a good amount of coffee back. Ive figured out the best way to keep waste down.. a bit tedious, but it works. Brush out the chute entirely, remove the hopper, scoop out all the beans from the throat that you can, grind through whatever is in the burrs. Then, in the morning, a half scoop or so ground through, and brushed from the chute, and then when I put the hopper back on and open the gate, the only downside is that my first shot's timing isn't the same, because the chute isn't full of coffee(its running of a gralab450, otherwise this wouldn't matter at all). BUT, if I simply dont clean anything at night/last shot of day, I need to grind through about 30grams to have totally fresh coffee coming out of the chute. The first couple days, I wasted quite a bit of coffee, because I was also dialing in the timer as well.

If it matters, the MXK only has TWO sweepers, not three like the 68's. And, they're not angled, they're almost just like the Mazzer Major. I imagine that, because it only spins at 300rpm, thats why just purging an empty grinder doesn't blow out all the remnants from the chamber like my Major did.

All I can say, having re-read this thread it that I agree with Jim (as one often does around here) . . .

another_jim wrote:I'm sorry to hear the Compak is another conversion. I hope the marketplace ends up making the Nino and Mahlkoenig (which are designed ground up to be doserless) a success, and sends all these elephant and aardvark grinders to oblivion.

(Note: quote edited for the sake of clarity, not content.)

Cheers,
Jason

Yeah thats a BIG +1.

Removing a doser and adding a piece of tubing, is not how a doserless grinder is made... at least not well. Home-Mods aside.

What cheeses me off is that they have the temerity to charge more for the doserless versions; and are getting away with it.

Ten years ago, doserless or bagging versions of grinders cost less (still does for the Cunill). Since I obviously don't need a doser, the first purpose built espresso grinders I bought were doserless. It's not something a newbie can predict, but after a few times thwacking a doser, I realized how much easier the process was than dealing with ever-constipated doserless grinders.

There are good doserless designs out there, everything from Bunn bagging grinders to Varios. Except for the Nino (and maybe NS Mythos?), it seems the manufacturers who specialize in bagging grinders do a better job here. Clearly, there is a learning curve to dealing with the transport of ground coffee; and it's unfortunate we're being both use as the guinea pigs and being asked to pay for it.

Jim,
There may not be perfect doserless grinders for home use as of yet but after close to a year using both a Mazzer Robur and Major doserless I am of the opinion that the Major D is very very good. The grind retention is minimal, I have no issues with static and while it can be a little messy around the edges I find it works well for home use. The Robur for home use is another story- I pull magical shots though there is more work involved in cleaning and flushing - an extra minute out of my morning. It's amazing what a combination of compressed air and a vacuum can accomplish.
Lets not forget these are high volume grinders intended for busy cafes refreshing portafilters every couple of minutes or so.
I've chatted with quite a few barista who use the Mazzer Doserless, including both Intelligentsia locations in LA, a well regarded shop or 2 in Portland / Seattle and a few shops here in Vancouver. I've heard overwhelming positive feedback from the crowd they were/ are intended to service.
I recently heard not so positive feedback from a barista who tried one at a friends shop but then again he thinks that when 49th P installs their Idrocompresso lever they will be the ONLY high volume shop in N America serving the crowds from a lever - so where does one go with that info.