PX4Flow which firmware to install?

I want to use a PX4 Flow module with AC 3.6.
I find two different repros on the web:

  1. the PX4 git for the Flow module
    which seems to be regularly updated, and

  2. the git from @priseborough which is referenced in the Arducopter wiki, but which is not maintained since 2014. Also the links to the dev documentation and toolchain are broken.

So, what should I use?

The ArduPilot documentation identifies that specific firmware intentionally. It’s the correct one for use with ArduPilot.
Can you raise an issue or PR for the broken links?

Thanks, James. Done.