A chance to act directly...
A link to a thread from the another forum I check into once and a while. Dan H(olohan) is one of the foremost writers of books in the heating industry on the subject of steam and hot water heating. "The Wall" is like the THR of steam and hot water heat. If you want to help, please do. But please don't reneg or leave a kid hanging.
http://forums.invision.net/Thread.cfm?CFApp=2&Thread_ID=51330&mc=19