Mark - Is this a lot of snow; rough ground; etc.... I was wondering if you would be just as much ahead to simply drive through pulling a rear blade? On gravel or dirt I can turn my RB backwards and drag it to clear snow without messing up the trail/drive by digging in. Maybe weld a smaller vee shaped drag to mount on your 3PH? also, running this in the float position will help to avoid scalping and tearing up your trails too.
Again...if your moving 30" of deep snow at a time this approach may not work.