I wouldnt want to install the chains each season, smart move getting extra set of wheels and tires was the way to go. Is that drag pointed or just looks like that in the pic. Do you use your drag on gravel or just snow? I have a long gravel drive and your giving me an idea.
it is an equilateral triangle 6ft on each side, the 2 leading edges have 2" angle iron as a cutting edge, the front point is protected with sheet metal, the post has a eye hook near the top on each side, for hooking bungees that keep the slack tow chain from dragging when I shorten the other side to angle it to wing snow to one side.
I make my first pass casting equally to both sides, then I angle to continue casting snow over on one side. It takes me 4-5 passes to clear a 12 ft width in a 6" snowstorm, deeper snow I have to get more creative, making a couple V passes, leaving a bank in the center, then winging that bank to one side
then I clean up what I can't get at with my snowblower