is any receiver compatible with any transmitter?
can we manually make the settings i.e. change the bounded receiver

i'm planning to buy flysky 6 ch tx with rx fr 3900
but i'm afraid if my plane crashes in the 1st encounter then the whole lot will go waste..

if not is there any receiver compatible with flysky?

i've tried looking for flysky receivers but they are not available separately

Google Flysky binding to Turnigy Rx.  I've read that some models of flysky TX can bind with Turnigy.