its not all that stiff with the heavy duty. I havent put the extra leaf in yet. I will be doing that in the next week or two in preparation.
Though, I still think i will need the bags. Make sure you use the daystar mounts for them so you can articulate still http://amzn.to/2s6aXU9
Yeah, I wont be having heavy loads often at all, plus i am going light on the build too, using c4 fabs front winch mount bumper setup, and stock rear bumper. Adding a ARE truck cap with accessory rack...and skids under it. So the medium duty will work with airbags for my application. Give a really good ride empty, and add air to the bags when taking the trailer. The medium are still better than stock anyways.