I know that this is simply another APM2 installation, but I thought I would post it anyway in case anyone might be looking for suitable airframes for their DIY drone. Also, this is kind of exciting for me since I am finally doing my DIY drone project and like to share my activity. While my dedicated UAV build is underway, I'm testing APM2 and its accessories in a SkyFly Max. I already had this airframe, but it would be one to consider buying new. It's inexpensive, easy to hand launch, and seems to have been sized for APM2. I put APM2 in the upper equipment bay and located the RC receiver in the lower bay (I love using those technical terms on a park flyer!).
I made a small box for the 3DR transmitter. I was a little concerned about heat, but it's not airtight and it sits in the airstream. I'll be mounting the ESC outside like the 3DR radio as well. It normally sits where the APM2 is now, but I also want to isolate it from the other electronics in case the ESC itself overheats.
My brother is my partner in this project. We're doing this in stages. First, we breadboarded the entire system outside of the airframe. I had the task of walking that tray of electronics around his backyard pretending to be plane and hitting waypoints. I can't imagine what the neighbors were thinking! Our next task is to get APM2 working in simulation. Only then will we move on to flight testing.