Yep, loosen the strap 1 notch for tree growth or it breaks the straps. check the bolts. If you try to do them all, plus prune around, it took me about 2 hours to do one. That was a complete redo, take old bolts out, put in inserts, put in wings, put rope up for hand hold. Great project for the winter. Makes them a LOT better. Do your favorite stand first and just watch the guys gravitate to that.
Another hint, I am moving mine to double trees, about 3 or 4 feet apart so that I have a place to hang my rifle, a place to take longer shot by using the tree as a rifle rest. Best Wishes, Chap