I once made the mistake of learning to use screw pumps for the first time. . . by using them to pump magma.
Pretty much any time I use screw pumps at all turns into a face palm moment when I invariably screw it up somehow. I think I am constitutionally incapable of making a pump stack that isn't hot garbage. I'm always amazed whenever I manage to convey any amount of liquid from one place to another. The only way I seem to be able to do it reliably without anyone dying or without somehow flooding my entire fortress with magma or water is with a bucket brigade.
Another thing I suck at is large channeling projects. How the fuck do I do this without at some point enduring a collapse? It's easy on paper but every time I do it, at some point, I dumbly create some catastrophe. My favorite is one where I was doing one of these next to a set of stairs that went down all the way to the semi-molten rock at the very bottom.
Then I had my usual channeling disaster, and the dwarf responsible was completely unharmed although knocked out, but another dwarf was knocked down the stairwell by the dust, and fell over 100 z layers all the way to the bottom, leaving blood and various body parts on every single z-layer. He was so obliterated that there was no actual "skeleton" anywhere, just stuff like back teeth and fingers.
And somehow his blood kept showing up other places in the fort, poisoned a well, and was just absolutely everywhere.
I guess my point is don't channel, it's dangerous. At some point I always channel though. I think I have lost more dwarves to channeling than to forgotten beasts.