Couldn't get this working with the PX4 FS but was able to upload AC 3.6.x developer build and that had an option for frame type 12. This did allow me to get all the motors spinning, although they have to be plugged into main 1-8, then aux 1-4. I think Aux 5,6 are set up by default as relays, but not 100% sure. In any case, this is different than PX4 so take note. For some reason I'm concerned the motors aren't in the right order because as I'm taking off I can pitch it forward back etc, but it seems to be reversed in pitch maybe, or that's on my end... this happened once before oddly, so it might be my controller's channel is reversed. Anyway... this is resolved for me I guess. Thanks.