I opened the notebook but I was not sure where you have the loss per bounce for the arm cavity.
PRC_RT_Loss = 2 * PR3_T + 2 * PR2_T + 2 * Arm_Cavity_Finesse * ETM_T + PRM_T
Do you count the arm reflection loss to be only 2 * 13ppm * 450 = 1.17%?