Now that all of you have given me an earful of knowledge I don't have, I would like a little information on the cost to installa Cobra system in a mature sugar maple.
It is a three-pronged one, that has been slated for removal, and I agree that it should unless cabled. I believe this would ad the necessary few years to allow the owner to plant replacement trees nearby and get them growing.
Anyway, the distance bewtween the stems, I would guess, is about 15 feet two-thirds the way up the canopy. Also, would all three be cabled together, or just two of the three legs of the triangle?
If the cost is significantly higher for Cobra, then I would go with the oft-used steel. As I said, the tree won't be there for, at most another four or five years.
I will also try and put a picture in, but my staff technology person (better known as Lynn - my wife) is sleeping! And I am here talking to you smart fellers (but ugly!) I'm the one that needs to be examined!