Al Good to hear you are feeling better. --- Allen Messer <al_messer@xxxxxxxxx> wrote: > When, if ever, were slotted head screws used on full > sized prototype steam engines, and where would it be > appropriate to use them on a scale model? Probably around the same time that they went from square head to hex head bolts Regards Dave Saudi-Arabia-On-Sea ___________________________________________________________ To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com 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.