It's difficult to get two servos of the same brand and model number to track let alone 2 different brands. Back in the day we used to open the servo and reverse it ourselves. Just about all 6 channel and higher radios now support dual elevator servos now so this really shouldn't be an issue. For those who don't have a TX with the capability then the Smart Fly Equalizer is the way to go. My opinion of course. As BH said..........more then one way to get the job done.