I am about to start my 36" build and i am lucky enough to have tapered bricks that should form my dome easily. I have noticed that most people use the indispensable tool to help form their dome but does this also allow the brick to set for a bit. I am finding it hard to understand why the bricks don't fall as you get higher before you have the chain completed and wedged. I know i can use Styrofoam forms but most do not and i feel it could get in the way. Have been looking at loads of pictures and it seems like the bricks are staying up by magic or really fast drying cement. Nerves before i start?