Get some larger (3mm) throw line for the installation of these. I have always used 1.75mm zing-it for everything but with the large buck blocks, it gets lodged between the rollers and their mounting frame (or block) on occasion when flipping it over a limb. Bought the 3mm stuff just for this. Other than that, the protective chaff sleeve will bunch up and not easily slide over the limb and into place sometimes, but it can be lock stitched in place on the red end to prevent this. For installation and removal, look at it just as you were installing a friction saver. I thread the throw line (outside to inside) through the black block, attach my bag, shoot over limb, remove bag, thread (inside to outside) through the red block, attach black ball and throw bag. Then haul up, flip and lower bag.