<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hello Grahame, Vivian and Chip,</div><div class=""> I think we can all help each other by critically examining each other’s particle models and pointing out possible errors. For example, I spotted 2 serious calculational/conceptual errors in Vivian’s electron model which he hasn’t acknowledged yet. The first is in his derivation of the lateral radius of a double-looping-photon electron model as it changes with electron speed, which he claims goes as 1/gamma (in your model the lateral radius of the double-looping photon’s trajectory doesn't change with electron speed, while in my model the lateral radius of the circulating photon’s trajectory decreases as 1/gamma^2 with the electron’s speed). The second significant error is in his derivation of the de Broglie wavelength, using the relativistic energy-momentum equation for the electron and its circulating photon. Can you spot these two errors? Vivian’s article is attached below.</div><div class=""><br class=""></div><div class=""></div></body></html>