Sorry you had to deal with a jerk at Home Depot, some of the guys there are really helpful, some just want their paycheck.
We bought a string trimmer at Home Depot - only to find out a couple months later that they don't stock a compatible line refill on their shelf...have to order it on-line.
New chicks seem to be doing good - I have to actually enter the stall and look into the brooder to make sure they are alive because they are so quiet. I may need to get some heat on them tonight though; heater is set up, just not turned on. They have been fine so far, running around doing chick things - eating , drinking, pooping, scratching shavings into the waterer. They are all sleeping together at night, not piled up at all - no peeping, no climbing to the center of the pile or anything like that. When the sun comes up, they wake up and start moving around.