Fix sagging, soft, squishy RockShox Reverb dropper seat post without tear down

This is a tutorial on how to properly fix a sagging, soft, or squishy RockShox Reverb Dropper post without doing a complete teardown.  It includes a description and diagram of how the shock works, why the fix works, and step by step video tutorial on how to do it properly.  This can be done in less than 1 hour and restores firm dropper post funciton wih no replacement parts other than Reverb Fluid.

0:00 - Intro
0:20 - Reverb functionality description
1:49 - Why does it sag?
2:25 - Fix explained
4:26 - Fix practical description
5:07 - Fix, Clamp and remove air
6:17 - Fix, Remove poppet valve
7:20 - Fix, Adding Reverb fluid
9:08 - Fix, Re-install poppet valve
10:15 - Fix, Bleed button / actuator
13:33 - Fix, Refill air chamber
14:00 - Test the fix
15:00 - Stealth fix differences
17:38 - Avoiding squish in the future