RE: aerobird challenger (newbie here)
You would need to buy another transmitter. The advantage of the SloStick is that you can outfit it with any radio gear that you choose: you can go as simple or as advanced as your budget alows. The advantage of the Slow-V is that it comes with everything needed in one box and will save you at least $100 over the SloStick. Replacement parts for the Slow-V are readily available at most LHS and on-line. Parts for the SloStick are usually not available at the LHS; only on-line.