DEPS works very well. Its lighter and way cheaper than the Bell Crank.

Many on this forum have used it and swear by it. I have used variations of it on everything from 40 sized models to 120-140 pattern models. Unless you are going to be using 3D throws greater than about 25degs this is the system. I would recommend it for sure. I had some questions and asked Troy via email and he responds with a ton of information its very helpful to me

Central Hobbies sells this system, and Troy has written several threads and has instructions on the Central Site on how its installed.