Mrs. Billygoat, Kiddo Billygoat and I are traveling in J from JFK - ICN. We went to get our boarding passes with our carry ons (1 B&R International 21", 1 Tumi Alpha, and two Osprey backpacks). The gate agent checked the weight of the B&R and Tumi. As each one was 12kg, she made us check them in. She (thankfully) did not weight the backpacks.