<font color="blue"> 1*I thought you wanted a boom mower.
2*For side extensions, we that frequent the Power Trac forum would consider the tow behind units from Acreaze(sp?) or Swisher and offset them to the side.
3*I think the closer you put the wheels in from the edges the more likely it is to eat a lot of dirt on dips and ridges. That, or it will just skid along and tear up the grass.
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1*That or a mower suspended from a frame that reaches out over the ditch.
2*I don't think the swisher has enough reach to cover a ditch that's 2 to 5 feet wide and these mowers would simply run into the ditch.
3* That's one reason for suspending the mower using either a boom or a suspended frame attached to the tow tractor.
Heck it could even be attached to one side of a MMM or towed behind like the tow behind mowers.