hey guys, new here. need some kind of help im required to design a gearbox which will be used to life an object of 2kg. details of the motor used are as follows: http://www.jaycar.com.au/productView.asp?ID=YM2712 have been trying to calc the number of gears needed, number of teeth on each gears but no avail. so is there any advice on how to start? thank you very much.