Chuck, the Senior that I learned on was a 3 channel but set up as a 4 channel. By this I mean rudder was on the right stick and the nosegear was on the left stick. This way no transition was needed when switching to a 4 channel plane. The only bad part is landing it in a crosswind. It can be done, but you won't be able to taxi back. The wind gets under that big wing and flips it right over! But other than that, it is the best flying trainer. Period.