Here is a summary plot, three molecules 12 arms total, individual dimer plots WHICH I CENTERED at the center peak marking the N terminal joining.  I think I will go back to finding peak height in luminance and finding distance in nm from the center as a measure of whether or not peaks exist. Plots just get smooth when i average them. A couple of things are quite clear, 1) just before the neck region there is a big decrease in luminance, 2) just after the N terminal (and whatever part of the C1 makes up the center) there is a big drop in luminance, 3) the peak next to the N terminal+whatever part of the collagen-like domain is involved in the center is a very consistent and marked peak, at about 27 nm width from center, and 5) there is assuredly a second peak around 45nm in total width, lying in that same span of the collagen-like domain, just before before the CRDs.  Whether there is a third peak in luminance in that span… well?

66 nm (unlabeled line in diagram below) is the approximate distance between the two valleys before the neck-CRD on each end, at least for this molecule.