If you ever want to try out Mode 1 or Mode 3 (or 4), but don't want to open up the transmitter, you can do it easily with the RealFlight controller on the sim, or with a ducky antenna on a real plane.

Just turn the transmitter upside down and reverse the servos as necessary. This puts the ratcheted (or untensioned) gimbal on the right. The only downside is that the horizontal trims are now on top of the gimbal. On RealFlight, you also have to change the Tx mode. In a plane, you have to switch the aileron and rudder servos at the receiver.

I can fly 3 of the modes. I do it just to see how fast I get my brain to switch modes. And it seems to sharpen my "thinking inside the plane" process. I don't have to turn the Tx upside down because I bought a Futaba Skysport 4 Tx for $20 and converted it, and my 6XAS is on Mode 1 because a friend and better pilot than I'll ever be flys mode 1 and it makes it easy for him to fly my planes.

If you hook a Mode 1 Futaba computer Tx up to another one in Mode 2, you can let the Mode 1 flyer fly your plane without any programming or hardware changes.