Some have successfully recovered their models high in the same trees I have described above by shooting an arrow with an attached, trailing nylon line over the branch restraining the model, then pulling the arrow with line attached and a weight on the opposite end such that the weight is caught on the branch. They then yanked like "H" on the rope until the model was dislodged. Saved on buying monkey food and training. A second approach that has been used is to chop the tree down particularly if it had a small diameter trunk and watch it fall on the model as it crashes to the ground. Gunshots have also been used of larger caliber, actually cutting the offending branch in two, but missing the model in repeated firings. Here a rifle scope is useful. But the best one of all was when one of our club members lost a brand new motor glider model when a brand new radio system failed and it merrily, thermally flew away. Sometime later the model owner learned that it was caught in a high tree behind a retired WW2 Navy carrier pilot's home 17 miles from our field. The model owner drove to the old warriors home and explained his ownership, upon which the old gent in his 80's promptly climbed the tree and retrieved the modeler's property. Yep, it really happened; amazing! I guess up to that point the old gent did not think the risk of climbing the tree was worth the effort.