Rainwater collection

Well, it's been a jolly long time in the doing but I've finally I managed to attach a gutter system to my greenhouse.  Works like a dream. I still need to work out the overflow system; I have a 100 gallon tank to fill as well as the two 50 gallon butts, so I think I'm going to be ok for water for a while! All I need now is a bit of rain.

I'm so chuffed about it I think I can to the same to the other side as well without too much sunlight in the process