To use the programmer,, All you have to do is bring the plane close to the computer,, or a laptop close to the plane and use a long servo extension or long USB cable,,, I've done them while in the plane several times.

If you have minor mechanical differential,, the most important thing to cure that is servo arm angle at center, if those 2 angles are off you will have some differential,, being able to set the center point with the programmer is key to matching them.

I've never used a match box,, so I don't know how to set that up

good luck