Hi folks, really looking forward to this weekend!

As a first-timer here, I have a question/request on the exact rules for receivers. I have an OrangeRX that I bought specifically because it has preset failsafes, but I appear to have toasted it. (Or it's faulty... but I plugged the ESC leads in upside down so it's probably my fault. It's definitely not working right, one motor creeps round when the sticks are at zero and both cut in and out when running. Have tried rebinding and no change. Assuming dead loss.)

I have a Spektrum AR610 that came with my Dx6e, which works fine. However, I was under the impression that the AR610 isn't allowed as it doesn't have a full failsafe mode.

Can anyone clarify whether the AR610 is OK to use (in the sportsman event) - in which case I no longer have a problem?

Alternatively, would anyone who is going to be there have a suitable spare Rx able they'd be able to sell me a Sunday? (As I'll be pushing it a bit to get a new one before the weekend.)