lparsons21 wrote:The only one I know of is the Versalab M3. While I drool when I read about the product it produces, I do cringe a bit with some of the design decisions that went into it, such as the single bearing on the shaft.
I've heard this mentioned as a theoretical criticism, but I've not heard of anyone having actual problems with bearing eccentricity. Mark at Synesso looked my grinder over pretty carefully & dismissed my concern on this point. I've had Mazzer grinders before & the Versalab compares well in build quality. The quality of grinds exceeds Mazzer Roburs that I've used. Yes, Versalab can be eccentric to work with, but I can't complain about the grinder. The shots from my machine at home are more consistent than those I pull in a shop on a 3-group version of my machine through a Robur. The proof is in the cup.
It is inconvenient compared to a hopper-bearing grinder for sure. From what I hear the Mazzer Kony would be a good alternative.
If you're into this sort of thing it would be simple to make a grinder comparable with the prototype Synesso (and probably LM's, though I haven't seen it.) Just get large conical (or compound) burrs, belt drive it & orchestrate a straight drop path. A Mazzer burr set would work fine; the tough part is keeping the burrs in register & rotating the outside cone.
More simply get a Zass or Peugot hand mill & chuck up a drill to the stem. That would save serious money over any of these options, plus you get a drill.
Ben King.