Just want to give Dennis and staff an "attaboy" for good service. I inquired about updating my older unit to the new mods they made. I got an immediate reply on what to do; I sent in my old unit as instructed and had the upgraded unit back in less than a week. That's good service. I've never been sorry for purchasing this unit and have always had good results with it. The service is just another reason to be satisfied. THANKS SMOKE DADDY!