I just stumbled onto this site. I was searching for some lost wax casting info. I'm casting some bronze pulley's for my boat. I made a silicone rubber mold to copy a pulley and make wax patterns I would like to cast the about 16 pulleys in one on shot but I don't know how I should go about it with sprue and vents. If any one has any good technique they would like to share I would be glad to listen. Alerion patterns.