from your past trailer experience, can you extrapolate to the loaded tongue and trailer weight of your new unit?
also, etrailer has some great prices (including shipping) on new products but seems you may just purchase some new round bars (should you find it necessary).
(fyi- we have the Pro Series RB3 WDH w/ 750# bars even though the dry tongue weight is way under 500#....no issues hooking up, round bar position relative to the ground or with Dodge Durango (w/ tow package) posture-loaded or unloaded.
