Thor Super C (Chateau/Four Winds) improvements and mods

Am excited to start towing as well. Trying to figure best way to go about it...tow trailer vs dingy? Now have 10,400 miles or so and I can say I have seen an increase in fuel mileage as engine has gotten broken it...at least as indicated by computer avg mpg. Only thing I have heard negative is the turbo...especially when using exhaust brake while in regen. Our model should not have ceramic turbo ball bearings that the earier 2011-2012 models had...but never confirmed that.