Yeah, because of the direction of the axes that's the way it comes out. I'm inclined to leave it as-is because then everything agrees, start reversing some and then others need reversing, etc. (I did reverse the wheel rotation channels, which actually [correctly] are rotating in the negative when you're travelling forward... but that's because wheel rotation is instinctively positive when moving forward. Longitudinal G forces are pushing you back when accelerating forward, so negative values do make sense) But you can fix this yourself Go to Tools -> Maths, click Add Scale/Offset on the right, select the G Force Long channel, and change the scale to -1.0. Now any log you open in that project will have that channel reversed.