I noticed that someone posted a request for help in trimming a Japanese Maple. I thought I would just pass on to the forum that You Tube has some fantastic videos on Japanese Maples and how to prune them correctly. Also, There is one on repairing a JM when they break under the weight of heavy snow. That particular video is offered by a nursery in my area, Merrifield Garden Center.
In fact, I've located the video and have included it in this message.