The wheel bearings/hub assemblies from the rear end of a 2000 Chrysler Concorde are mounted boxes that are a little smaller than the pockets I put in the ends of the tank. The space in between is filled with sections of an old tire. that provides some flexibility to keep from overloading the bearings.
Getting the pockets in the right place took a lot of measuring and double checking, but it was worth the effort.
One end of the frame is bolted together for assembly and servicing.
The roller is going to be used in the Land and Forestry Management Program at the college. I'm also going to build an attachment so they can tow it from the drawbar on the tractor instead of using the three-point hitch.