You have answered your own question. The distance is not an absolute what is important is any reduction in range from what you formerly attained or a noticebly shorter range than your others. There is not way I would fly that Rx if it were me.

Perhaps this would be a great time for you to consider a 2.4 system. The prices are as cheap as what 72 once was, but most important you will realize an improvment in reliability.

I have now I think 39 ships flying on 2.4 (just added another this morning) and there is no doubt that I have virtually no mystery glitchs or RF link problems. Something I could not claim four years ago with nothing but 72.

John