By the way, if you want a cheap transmitter that will work with almost any 2.4GHz receiver including Futaba, the Jumper T16 Pro Is fantastic. It is unique in having a built in 'multi-protocol' module which allows it to bind to most brands of receiver. It's a very capable radio, 16 channels and cost about £140 in the UK.
Only real downside is the the OpenTx software it uses, although extremely flexible and powerful, does take some getting to grips with.