Hope you left a container under the drain hole or your drive is going to be a right mess
As to what made me feel like a wally
Fitted a 16 camera CCTV system and when I powered it up realised I had fitted all 16 upside down! In my defence they were "eyeball" type cameras and its not easy to tell which way is up with them.
Sods law says that it had to be one of those times when the customer was looking over my shoulder when I powered it up.
Considered just turning the monitor over as well but ended up putting them all right