Fuck ya ClearDome, the dry looks dope! How did you say you built that one? Full rundown is in order! haha.
Also, if you're making hot knives, you should try the "extract bowl". Make a bowl shape (not too trick, just close off an end, and flare it out to give it the shape) and then instead of pushing the push in, blow the push out. Pop a ring of small holes near the top of the push (bottom of the cone you just blow out) and then push the push back in, like normal. You should be left with a ring of holes around the top face of the bowl, no hole in the bottom. Drop hash in there and glo-rod it, its the shit.
SA, When you buy raw glass, it comes in both rods and tubes. Tubes are hollow, rods aren't. You build things out of both, using your breath and the heat and sometimes gravity to shape the pipe.
Does this answer your question well enough, or you want more detail?