RE: receiver after crashes...
CGRetired... I couldn't agree more. Another thing to consider when mis-matching parts is liability. If you've modified something, you don't have a leg to stand on if anything goes wrong. The manufacturer can just point to the section in the manual saying to use only OEM parts and it is all on you.
Also, accidents are bad for the hobby. The "anti-fun" crowd is out there trying to impose regulations on or ban just about any activity that people enjoy. RC flying doesn't need the bad press. That's just a theoretical extreme scenario of course but it is something we all should think about.
Like I said, RC airplanes are still airplanes. I try to treat mine with the same care and precautions I would for a full size plane carrying people I care about. Not to mention the fact that I hate risking the time and money I have involved in every plane.