Good question. Not sure I would change anything. All the highs and lows have got me where I am today. Wife still using eGo-C upgrades we started with a year ago. Now I have learned to rebuild them and all the coils for the different heads I own. Guess my only wish is I would have learned to save all the burners I have thrown out before I knew you could clean them out and reuse. I look after four other peoples systems as well as all my own. It turned into a real hobby that I enjoy. So really would not change a thing.