When ganging up several servos you have a few options. JR Matchboxes, Smart-Fly Equalizers or a Hitec Programmer. My preference is to use the Hitec programmer (though it only programs Hitec servos). The programmer helps use lower value radios by programming reverse, end point adjustments and centers. It's also helpful in setting up multiple servos on one control surface so that you can dial in the servos to work together perfectly and then simply use a Y-harness (or Power Expander) to gang the servos together. The programmer can test any brand of servo though it can only program Hitec servos.

I find the JR Matchbox to be much easier to use than the Smart-Fly Equalizer, so we don't offer the Smart-Fly Equalizer.

The JR Matchbox is easier to use than the Hitec Programmer as well, though there are other disadvantages to the JR Matchbox. The Matchbox is a bottleneck for the current to the servos. You have one plug and one wire feeding power to 2, 3 or 4 servos. This is fine with smaller models, up to 35%, but above that, it's too restrictive. Adding a separate battery is an option, but if you use 5 Matchboxes on a plane you don't want to use 5 additional batteries due to weight, cost and complexity. Also, the Matchboxes add cost and weight, while a single Hitec Programmer can be used and removed and it can be used on all your planes. This way if you sell your plane, you don't have the extra cost of the matchboxes. If you're lucky, you can borrow a programmer from a club member and it won't cost you anything to program them.

Using a Hitec Programmer is a little tricky, so below, I'll give you some hints on using it. I suggest that you read my suggestions for using the programmer before purchasing one so that you know what you are getting into. You may opt for the Matchbox.

The advantage of the Matchbox is that there is no difference between the programmer and the receiver as in the Hitec programmer. You just set the Matchbox and that's it. In many cases you have to guess at the programming with the Hitec programmer. It's not that difficult once you do it the first time. I believe that this mismatching between the programmer and the receiver only occurs with JR radios. Futaba and Hitec do not have this problem as I understand it. I only use JR so that's what I know.