Tubes can be made 2 ways by dipping with a aluminum rod into the plastic. Or making a 2 piece aluminim mold. You have to dip several times to get the colors and thickness you want. Pouring the bass assasssin with the stinger tail would be tough, you might be able to make a 2 piece mold, but I would not guarentee that you will get the plastic to flow into the tail. And with the cost of tubes you cant pour them yourself and save money. Only pour the ones you cant buy. I have tried pouring bait simular of the bobby garland baby shads and they are tough with that small tail. I dont care how steady your hand is it still shakes. If you got any other questions let me know guys.
Ted
Neither snow nor rain nor heat nor gloom of night will keep me from crappie fishing!
2010 Lake of the Ozarks Super Slab Champion