Oring goes under the nut which the screw goes to. Main spring has a longer bent piece kind of a 90 degree coming off the end that goes into the cog wheel there's a tiny hole which it fits in, then the shorter 90 bend goes in the bottom piece or outer housing, there's a few small holes for it! I put it together then wound it till the tension felt right I think twice around and you half to lift the cog just enough to clear the stop, there's 2 holes under the piece that spins to hold the cover on 2 springs go in those holes and the 2 balls go in on top of the springs, then it gets screwed back together! Hope I explained it ok!!!