I use just enough water to be able to squeeze into a ball with no drips and then toss from hand to hand without the ball breaking or cracking.

jusme,

I'll try that, and see where it takes me. The last thing that I tried (hypertufa inside a plastic planter item) was dry enough to avoid slumping, but sure wound up with a lot of little voids.

I'll need to keep on fiddling around,

cheers,

Sean

Try tamping the stuff after you get it inside the mold and that should get rid of the voids for a smoother finish.I just put all my tufa in then using my hands to push it so it gets rid of any pockets of air.Hope I explained good enough but maybe someone else will add more or a better explanation.