Ed's paper includes a description of (Shoulders) EVs in chapter "MBL Energy Estimation by Feynman, Shoulders and Bostick":
"Earlier, Winston Bostick noticed this anomalous magnitude of concentration in the plasmoids he
researched, and in his articles he called them "vortex filaments." Bostick, Feynman and Shoulders
believed that these concentrations of charge violated the known space charge laws. However, they
believed that this kind of object exists even though it violates the law of mutual repulsion"
Now it would be interesting to hear Wyttenbach's opinion from his theory point of view - does SO(4) allow such constructions ?