Hello. I'm supposed to be an electrical engineer but between my ears there is physics! In my sophomore year at Purdue (1964) I got tangled up with the superposition theorem and its lack of shielding between charged particles. I fashioned a model for electrodyamics that included shielding. In the model, protons and electrons emit force carrying particles which can be scattered and/or be absorbed by other charged particles. In 1972 a guy who worked in gravitational physics said my model reminded him of the "emission theory" that Walter Ritz (Swiss physicist 1878-1909) proposed in 1908. I dug into Ritz's work (which was largely unknown in 1972) and got hooked. Am in the process of helping his ideas work themselves back into mainstream physics.