I am considering building a levitation but need some guidance from anyone in the know. Specifically, I would like to know if anyone can recommend a particular linear actuator? I'm thinking 24"-36" stroke, and what kind of battery do you find delivers enough power to have a decent speed? I'm not set on using an actuator if someone has a better idea, but I feel like that would be the most efficient and more easily hidden apparatus. This would be used at a halftime performance for a local band that would like to include a levitation effect in their halftime show. So that should give you an idea of the limitations I'm faced with. I'm open to any and all ideas!