The micro reciever would work best with the small electric plane since weight is an issue. You can use the 4 channel rx and the 6 channel tx together. The main thing to keep in mind when matching rxs and txs is that both need to be either - shift ( fut, hi-tec) or + shift (jr, airt) and on the same channel. The brand of reciever must use the same brand of crystal as well.