How do you get the three bridge gears in darkice mine on starfox adventures

Here are the locations of the bridge cogs. 1: After you kill the sharpclaws with the cannon,go to where the life-force door was to find a chest containing the first bridge cog. 2: Do the same as with the last cog,then go in the central building to find a chestcontaining (man I use that word a lot) the second cog. 3 While in the cannon,find a boarded wall.Blow it up and go through the hole. Man it's cold here:).Anyway go up the ramp and have Tricky Flame the ice wall to find the last chest containg the last cog.