ORIGINAL: 1320Fastback
I would guess that your planes from the factory are actually trimmed wrong.
Not bad for a ARF or RTF but how accurate could they be out of the box.
Reminds me of the pre flown Blade 400 where they bragged it was trimmed out of the box.... They weren't.
They've been close enough to fly. Over the winter I'd like to get things as perfect as I can. Some of them are visibly off a bit though. I will fix them.