The two big questions were where was I going to map it out and what with... oh yes in the office between the cubicles and the what was with a 300mm ruler. It was long and hard and I had to bark many time "Don't you dare step on my blue stickers" but it was done and I now know roughly just how big my pool is.... I would say average size.
I even managed to get one of my engineers to sit "in" the pool just to see how deep it was ... "Why am I doing this again" "I just wanted to see if you fit!"
All in all a good waste of an hour on my hands and knees in my good pants just to make sure it worked.