In some of dragon's Panther G kits, the roof of the turret has a little U shaped thingy right in front of the copula. It's not quite aligned with the centerline of the copula, but is slightly offset inboard. On other Panther G kits, the u shaped thingy is not there. But even on close examination, all other aspects of the turret roof in these dragon kits are precisely identical, down to the detailed weld pattern and flame cut patterns on armor plate edges. The kit that didn't have it include the steel wheeled version. The kits that have it include the smart kit late G, and the recent command tank version.

My question is, what is it, and should it be there on the G turret? If so, did dragon simply forget about it on some early kits and added it back on later ones? Or was this feature on some Panther g turrets but not others, and dragon was impressively detail oriented enough to differentiate which tank should have it?