Hi, I'm new to OpenBuilds, trying to build a device that would move a painting up and down to cover a flat screen TV. 1. The system would need to lift 12 lbs, and travel 32.5" or ~825mm. 2. I'm thinking the gantry plate would attach to a custom stand-off bracket, which would itself attach to the wall. The lift mechanism would mount vertically inside a square edge frame and be hidden from view by the canvas painting. 3. What parts would be required for such a mechanism including motor controls? ANSWER from experienced member: For lifting and holding anything I would use a screw, the 8mm acme openbuilds has would work great for this (as long as it's less than 1000mm); for the motor, I would not use a stepper, just a simple geared dc motor on a limit switch setup for up-down limits. Any additional thoughts and suggestions would be much appreciated. Thanks. Dennis EDITED 7-2-19: My conceptual idea for this mechanism is depicted in the attached drawing. It would use either a sub-frame onto which the actuator is mounted (as shown), with the actual canvas painting on its own independent frame sitting over the sub-structure or, if the gantry-to-rail attachment is sufficiently rigid, I would attach a cross rail at the top of the track onto which a singular canvas frame would mount. The benefits of the latter idea would be reduced weight/ load. In either case it seems important the mechanism is easily accessible for adjustments/maintenance, etc.