Would making them somewhat like the bombs be easier, so you could just kind of make a few adjustments to the code? (The only "coding" I have done is changing stuff on some .config files, so forgive my incompetence). Just have a small disk (1.25 or .625 or something) that you place on top and then right-click to choose diameter and type and all of that and it places the warhead there. This is just a random suggestion, so do with this as you please.