I purchased an Airtronics MX Sport(my friend still uses one from his old racing days and it felt great compared to my rtr stuff),but no receivers.I think I know it needs FHSS-2.My question is,does it have to be Sanwa/Airtronics?I can't find any anywhere.Thanks for any help.It's not a huge deal because the tx was cheap.Just looking forward to using it.Thanks again.