IMHO...there is a world of difference between commercial and RV'ing
Professional vs person on the street.
Level of regulation are far apart. How many of us with civilian drivers licenses
are required to take a regularly schedule physical? To keep a log book of your
hours behind the wheel intermixed with required rest time?
Back to the OPs question...first decide if you believe in the ratings system or not
If not, then do whatever...but know that by going over the ratings...you have
taken the OEM off the warranty hook (if there is any left) and the biggie: Liability hook
If yes, then learn how those systems work and pay attention to the fine print.
Fine print is a legal positioning drafted by their corporate lawyers. Some
call it legalize or weasel words...both terms has merit in my book...
To the newbies reading this trying to learn a thing or two...reference Shiner's
posts with links to some of the governing agencies and their laws/acts/mandates/etc