I purchased a 84' seed hawk in the fall and took the 7 Plexi wings off. It would have been 64' but the outter wheels stuck out past the last opener so I welded on a flange and bolted on a stub and shank assembly to each side to make it 66'. Had to change the outter secondary manifold head on each side from 10 port to 11 port in our case to make it work. Hydraulically I just had to install a few caps on hoses going to the 7 Plex wings and turn down the wing down pressure. Worked awesome.