RE: RX repair? Or buy another.
Its worth going to PCM if you have some nice models, no unkown glitches, the pcm will hold the plane at the same settings and if you have a fail safe it will kick throttle down to let you know, if you have a glitch you probly wont know, your plane will fly in the same direction you pointed it before the glitch, my opinion, get new recievers and make sure they arent ppm but pcm(pulse code modulation) + they are the upper end of recievers and are built with higher quality, not built to be cheap though!!!Good luck!