I have successfully disassembled and restored a number of movements, but all have been with sub second hands. I'm working on my first sweep seconds hand movement and am unclear on how to remove the third wheel from its bridge. It's held in place (keeping gears together on both sides of the bridge) by a small circle plate, pictured and pointed to here: Can anyone tell me how to remove this, or how to separate the gear(s) from the bridge? Thanks! Seth