There aren't any Old US 61 shields on MN 45, but they reappear on CR 61 east of Scanlon
This is why I cut it off where I did - I couldn't find these other signs, and focussed at the MN45 junctions in my hunt for them.
Anyway, extended.
Also, the route as drafted is missing a point at MN23_W.
I, perhaps lazily (see also the I-35/MN210 junction), treated it as 1PPI. I've split these off now.