Six types of ForbMod fits to EPHIN data based on visual analysis: (a) a good fit (event1, inner structure borders); (b) an asymmetric fit (event1, extended ICME borders); (c) a few-data-points fit (event2, inner structure borders); (d) a large-scatter fit (event2, extended ICME borders); (e) an under-recovery fit (event4, extended ICME borders); and (f) a substructuring fit (event17, extended ICME borders). FD_obs was FD amplitude-determined using a traditional algorithm-based observational method, whereby FD was measured from the onset to the minimum. FD_bf is the FD amplitude obtained from the ForbMod best-fit procedure and MSE is the mean standard error.