OSMO X5 Z-AXIS ADAPTER
If you have trouble sourcing the parts or just want one ready to go, they are available to buy here https://www.xcopters.co.uk/shop/dji-osmo-x5-z-axis-damper
The DJI Osmo can be used with the Zenmuse X3 camera or the X5 camera using a DJI adapter. But if you try to use the X5 on the DJI Osmo Z-Axis Adapter it is too heavy and doesn't work. There has been some rumours from DJI that an X5 Z-axis is going to be available, but I don't really want to have to buy more adapters.
This shows a simple, cheap and reversible way to modify the DJI Osmo Z-Axis Adapter to work with the X5 camera which means you can easily swap cameras while still using the Z-Axis.
Assembly instructions are here: https://youtu.be/FIts8uxWFZk
You need the following additional components:
One thing I missed on the video was an M3 nut I pushed into the bottom shock absorber hole that allows the 3d printed extension to be screwed in tightly with the M3x10mm cap head screw.
You'll also need the expensive bits:
DJI Osmo: http://store.dji.com/product/osmo
DJI X5 Osmo adapter: http://store.dji.com/product/osmo-x5-adapter
DJI Z-Axis: http://store.dji.com/product/osmo-z-axis
I'm not sure how this mod affects your DJI warranty, but it's a benign modification and totally reversible. However, it's all at your own risk!
Print using ABS or PLA with suitable settings for your printer.