I got an inert AT4, and I have decided to use it as a project to fire small rockets. The AT4 will provide the launching platform and ignition mechanism, and the rockets will be made to fit the AT4. (Yes, legal; propellant will be less than 4 ounces.) The AT4 has a working trigger mechanism, and I would like to retain all possible original components and design features. What I need is any diagrams, cutaways, or schematics of the AT4 launcher, especially the trigger mechanism. My searches didn't find anything useful or detailed enough, so help would be much appreciated.