As pointed out, people do source modeling with template montage and template MRI; and I was planning in doing so. In my mind, precise source modeling requires both an MRI scan and digitization of the location of the electrodes on the head of the subject at the recording time.
I do not have the second, but I do have MRI scans for every subject.
Am I correct in assuming that computing the coregistration between the realistic standard 10/20 montage and the actual subject MRI instead of using
'fsaverage' would be beneficial to the source modeling even though the montage does not contain the exact sensor location?
Note: Each subject had 15 recording sessions. Even intra-subject, the position of the sensors is not exactly the same at every session. This is why I am not sure it is worth investing time in creating the BEM and the coregistration.
Thanks for your opinion!