I have the two Fat Boys above. The one on the right (E-4) works great. The one on the left (E-1) has a frozen adjuster ring. I have been working on the E-1 for a few hours using hot soaks and I noticed the "gap" shown as an arrow. My E-4 does not have this as can be seen. Does this mean that there is something mechanically wrong with the E-1 and no amount of soaks will free it? Any comments will be appreciated.