That's some impressive battery life! I'll never get close to that; I trade most my stuff too often.I also own and been using Ctek for many years.
I own a 35 hp F series Kubota that I leave ctek on all winter and got 15 years out of the original battery. I feel the ctek had to play a role in extending the life that far.
Agreed, it runs a lot in the summer and keeping a good trickler on it attributed a lot but still shocked it lasted that long.That's some impressive battery life! I'll never get close to that; I trade most my stuff too often.