Yeah, I also had trouble with no. 11 as well. I ran straight past it at first and then started running around and got a bit frustrated, so then I was like 'OK just go back to the start and begin again'. Ended up finding it on my way out, but it was a confusing place to put it...with all the red and white pipes and that.....anyway...You had a really good run though...congrats! : )
thx, thats exactly what i did!