Off Topic cont'd:
Have you worked with much
Hebel Aerated Concrete Block ?
High insulation values (R-11 to 35) and you can shape and drill it with a 1" Spadebit and a 12V Drill! Neat Stuff... Getting more popular among the "hippies" around here, I've heard it's fairly popular in Europe.
[This message has been edited by sparky66wv (edited 09-23-2001).]