RE: receiver after crashes...
A really good guy in our club had a crash and then put the same receiver in a beautiful GP Shoestring little while later. It range checked fine. During the flight it glitched several times so he wisely decided to bring it in. On the final approach it glitched bad and the plane went in. It was pretty sad to see that happen t such a nice plane.
I see RC planes just like full scale planes. If you take too many chances or shortcuts, bad things can happen. I like my planes and have too much invested to risk something so preventable.