well... IF you did that without an editor I will say.. job well done. How long did it take you to do that. I have been working on mine off and on. probably 2 1/2 hours total. I created mine with pillars that go into the nothingness by placing lava blocks and letting it propagate downwards then removing the lava block and placing a water block.. now it looks like I have fort in the sky. I do seem to have used up quite a bit more stone then you though... I haven't tried to finish the challenges as quick as possible. I have also created a super efficient stone maker using 2 water blocks and a lava block. I haven't seen any designs that use that though im sure they exist. Using a stone pic I can gather about 100 stone from it before the pic dies in a fairly short time instead of waiting for a stone to form I just turn to face the other stone that just formed. edit: Also what version of minecraft were you on? in 1.9.2 you can't leave the torches out in the snow... it will kill the torches if they are not covered.