Al, A lot of early locomotive boilers were lagged with wood strips. Look at the photo of "Locomotion" that we were bandying around a while back. Jesse > Jesse, this is a horizonal water tube boiler or I > would do as you suggest. -- Binary/unsupported file stripped by Ecartis -- -- Type: image/jpeg -- File: locomotion.jpg MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.