Probably because many of us has had chucking issues and what we found was just the opposite of some of durbs opinions that say it won't work.
For example is I found air bags eliminated my chucking issues with a certain combo but I've been around towing trailers since '58 and I have enough experience to know air bags may not work in all chucking problems.
Durb does have some good pointers and reasons a certain combo can have chucking issues but to say this or that will or won't stop chucking isn't true for all combos.
