Hey feathers, we use to have some experts in that realm of likeness here. Not sure if any are here: however, I am sure: sooner or later one will answer your question. I have (in years past) read many threads on this topic and surely you will get a technical answer if you wait long enough. Would rep you for your patience, but my super toker power has vanished without explanation-maybe it is something I failed to update or something. So, rep to you anyway for it! PR