In some the early kit release the 7mm anti-rotation guide spacer (109-357) from page A17 was swapped with the 5mm tail spacer (109-355).

Substitute a 22 mm shanked bolt for the 100-320 M3 x 20 socket head bolt in the tail rotor bell crank. The 20 mm bolt did not adequately engage the lock nut which could result in the loss of tail rotor control if it came undone.