Academy's 13299 "Gruppe Fehrmann Tiger" has an accuracy error in the sprocket. Fortunately it can be corrected easily.
The kit's instructions tell you to use part L11 as the outer half of the sprocket. But, part L11 has a configuration that never existed on any Tiger. It has the sprocket arms aligned with the bolts and the teeth. For technical reasons, the real arms were placed between the bolts.
A correct part exists in the kit. Simply use part b16 instead of L11.