I've designed this top plate conveyor for a project I'm working on. I chose this conveyor because it is very flexible in terms of being able to go around corners and also because it should be very quiet. (The idea being to use it in a board room setting - more on this later). This design requires 3 608 bearings for each plate. I am still finalising the drive mechanism and will update when complete, but the idea is to use a spring as a flexible worm drive and shown in the image. The conveyor would also require a track depending on your specific implementation which is not shown in the gallery. An M6 nut holds the plate onto the central bearing while 2 M3 nuts will connect each plate with its connector. More info on this project at: https://sites.google.com/site/gineer/cremabot Gineer R&D