Hello, I hope you super-geniuses will please take a moment to point a layman in the right direction. If I can get past this sticking point I can complete the rest of this project myself. I need something small (tennis ball sized or smaller, smaller is better), lightweight, fast, electric, and capable of producing downward force of about 15 lbs, more force is better. The travel distance need only be about 1.5cm. An actuator for an electric door lock for vehicles is close (and cheap,$5) but lacks the force (it produces 10 lbs) and does not seem robust enough. The force does not necessarily need to go straight down, a small rotary motor with an arm that rotated would work, but I'm guessing the torque on a small motor would not be capable of producing significant force. I really have no idea even what is available, any input is greatly appreciated, TIA.