[Biff]

-When you notice that with the welder and the kiln (which is heating the garage when it's 2 degrees outside) are pulling 75 amps at 240v and hope you can get some freelance work to pay the electric bill.
-When one of the cat's gets into the garage and rolls in the dust and aluminum shavings, and you pick him up and tell him he's a good kitty.
-When the weight spread sheet shows that you are going to make weight with all options installed and you refuse to believe it.
-When after the bot is shipped, you come up with a backup motor plan and order the gearbox's to implement that plan.