Hey Justin, I grew up with balsa wood planes and what has always worked well for me is to wrap the reciever and flight computer with 3/8 foam packaging wrap. I leave my ESC unwrapped so that it can vent to cool. I pack everything tightly into the fuselage with this foam as well. I don't secure anything besides the servos and motor to the fuselage. The method behind my maddness is that if you happen to have a bad crash everything should just pop out on impact and lay out safely on the ground. So far It has worked perfectly every time. Just like it did in this video.