Bob, Thanks for your comment about the header and tunnel. Maybe I can get to that job this week end if time will allow. Oh and by the way to anyone who saw my earlier comment about the 27-1/2" pipe length, I was wrong about it being to the end of the pipe. It is to the baffle as I'm sure Bob & Matt know. Don't know why I thought it was to the end of the pipe. My bad.[sm=72_72.gif]