Yeah, after it was 2/3 in and really tightened up I got bull headed and tried to force it. Pulled a portable compressor out and strung air hose to the tree - old 1/2" impact would not budge the *amned thing, which should have been my stopping point but nooooo. The tree's 20" diameter, so drilling through is really not an option. Bigger pilot hole, knowing that the tree is going to grow the hole tighter in a short time anyway.