We have stabilized the torquing of the hitch receiver by the bike rack. Here is a link to the procedure:
http://s513.photobucket.com/albums/t...%20stabilizer/
The OEM hitch receiver is fastened to the cheeks by 4 bolts each cheek. The cheeks are welded to the frame. We undid the bolts, took the receiver off the Monty, added the 1.5" members and front cheeks, painted, then reattached to the Monty using the OEM points in the back and four new self-drilling screws further forward. The whole frame is lightweight and no welding was done to the frame.
The team was: Keith the fabricator (holding the refreshment); Steve the millwright (holding the bike hitch up); Don (Wiarton Willy of the MOC, not in picture) the helping hands; and Dave the engineer.