Gazza,
40 foot is a big pole! I don't want to sound negative, but I don't think it's going to be of much use to you; for a while at least.
You can use this pole to clean lower than 40 foot, but it's going to be heavy and you're going to get tired of using it.
Also, for the price you paid, I could've recommended something far, far better that would've suited you from ground floor work, to fourth story work (40 foot).
I think you should've asked here first, before purchasing.