Features on this MOC.

: Each axle has it's own individual suspendsion as shown in the sub-folder. Acts as a replacment
  for the 'Air-Ride' system that is primarilly(spelling?!) used today 

: Dolly legs are geared and will hold the weight of the trailer when a truck is not undernieth it
  I have this system on most of the trailers that I build. I didn't put it on the rear tanker unit due to
  lack of room!

: The two little hand controls that you see on each trailer are a replacement for what is called internals
  on each trailer. Internals are a second valve located inside the tank at the bottom and are opened and closed 
  by either cables or by a air valve.

: Fifth wheel on the front trailer. Rear trailer is able to disconnect/connect at any time. This system is also
  on all of the other MOC's that have fifth wheels on them