We have built and tested custom PX4 modules on the original VOXL hardware at PX4 version 1.11.

We have found that we can upgrade to 1.12 using the voxl-dev-1.12 branch, but for the sake of isolating problems, we would like to be able to build our 1.11 firmware for the VOXL2. I have tried to building with a few old branches that seem to have been never fully supported. Branches like v1.11.3-0.1.3-voxl2-rover. These seem to have strange features like the 1.12 EKF, however, and often do not compile without errors.

Is there some way we can build PX4 1.11 for the VOXL2 without too much effort? Or is it only reasonable for us to upgrade to 1.12?

Thank you