You don't have to, but it is easier and more accurate to simply adjust your rigging.

Use the farthest hole on the servo arm if the pushrod isn't out there already. It takes only about 20 seconds to move a pushrod connection.

My setup right now is with the pushrod in the next to farthest hole in the servo arm. It goes to the 3rd hole out on the aileron horn. And the airplane rolls quite fast. I've had the pushrod in the 2nd hole out on the aileron horn, but it was too fast for my wishes when using high rates. I'm betting you'd have liked that roll rate.

Thanks for bringing up this question, because it made me go look at my rigging. Since there are farther out holes on both the servo arm and aileron horn, I can probably move the pushrod out equally on both at the same time. Why do that? Same reason you want to change throws on the airplane instead of in your radio. It's more sensible to do it that way. For accuracy and leverage.

BTW, if you really want more effective ailerons, you need to read up on the problem the ARF rigging causes with the Skybolt and most smaller ARF biplanes.