Will this radio work?

[rc_farmer]

Yes, it would be a good idea to get a minimual of 6 ch's for future expansion. If you are going to take advantage of the full functionality of the mfu, and the gear shifting function on the transmission, you will need 6 ch's. Choices are many, but most of the guys here use, Dx, Airtronics, or futaba brand. I am partial to the Airtronics RDS8000 as a good entry level 2.4 radio/works well with MFU.