Sorry I should have said I was going to melt the lead in my lead melting pot. As far as the tin goes I go to dollar store and get one of those tin playing card holders pour the melted lead in it now I have a flat 1/4 inch lead bar I can cut. I've seen that Liquid Gravity that would be the way to go I think I will do away with the dowels and mount the engine to the fire wall and balance it and hope it comes under 14 lbs as far as batteries Iam using a 4.8 volt 2000 nimh for the ignition and a 6 volt 2500 nimh battery for the receiver mounted up front by the fire wall the engine mount I am using are large T type don't know the name