Yah, I guess it doesn make more sense if you think about it. Just seems like not the best way to describe it, especially to someone building a trainer who is likely a beginner.

Regardless, just get it as straight as you possibly can and it will be fine. I've seen some very crooked airplanes that could be trimmed out and flown. They may not fly ideally but they can fly. I'm not advocating building anything but straight of course.