I've tried that hose leveling bit in real life, and it's not what it's cracked up to be. I'm not talking about accuracy - it's the number of times that I needed to go back and forth from point A to point B to add water, make minor adjustments, etc. I tried it on two occasions during construction, and each time said "to h.ll with it", and used a line level cross-checked by laser level to verify height.
While it's not rocket science, the hose bit just didn't work for me. Maybe I just didn't hold my mouth right.
