Olli,
Here’s the link to a zip file containing 3 binaries (v2 = Pixhawk, v3 = Pixhawk2, v3 = pixracer).
Tridge has lightly bench tested it with a Pixracer and Spektrum receiver. I’ve test flown it on a regular Pixhawk (with futaba receiver) and it seems OK.
Think you could give it a try? If it seems ok we will release it as AC3.5.1-rc1 in the very near future.