Having a heck of a time figuring this out. I have had a lot of things blocking me from getting progress done also. Im going to talk about my issues here in that maybe I can understand better my issue by at least writing about them. Getting the landing gear to touch the ground (setting up contact points) is a 2 fold issue, and very complex in AF2. You have the TMC which is the 'start up file' of the plane, which at the top of the file shows the contact points. That contact points works for half a second, then the plane falls onto its 'suspension' points. If you start the sim in Pause mode, your plane will be sitting proper via the contact points in the TMC file 'if' you have it setup right in the TMC contact points. Then when you unpause, the plane will drop onto its proper suspension points, which are called 'collision hulls' and 'rigid body graphics' (parts) and 'wheel hulls'. In this are also 'connections' called 'joint multi' and also 'joint linear'. (That last one I havent figured out yet, nor the rest really). So you have sections near the top of the TMD file (the main config that manages the model, flight dynamics, parts and animations, and then sound, in that order). The collisions and hulls are near the top, the graphics parts are lower down, right before sound. Animations must have 2 sections, mirrored. You setup 'servos' for animations near the top, below Dynamics. Then on your graphics (parts) sections, you call the names of the servos in the parts blocks. Sort of like wiring them up in the simulator. I have tried copying over the landing gear sections from the Extra 330 and also the DR400, and tried adjusting them to work in my own Bullette aircraft. Unsuccessful. Usually she falls through the ground or rockets up in the air. If you have your TMD really screwed up (like mine is now) then the sim crashes. This is usually because you have parts named that are not in the model (like GearLeftMain instead of GearMainLeft, typos, etc). You can look at the TM.log file in MyDocuments/Aerofly.... and scroll to the bottom to see what happened to your plane. Also, and this is a good tip. If your plane is selected and accidentally saved and its crashing the sim, you can go back to the default Cessna by taking out the string with your planes name from the 'main.mcf' file (open with Notepad ++ or Notepad to edit). Search for your plane, delete that single string. Not the block but the string. So that is where I am at. Trying to get everything rigged. Not easy. Understanding about animations needing a counterpart 'servo' block near the top under Dynamics was a big help. That helped me to understand the system a little better. Now to figure out these contact points. My next 'target' will be to connect the lower landing gear to the upper landing gear, make collisions for each and the tire, make a multijoint for these, and see if I can get it to sit on the ground. Oh, and the hingedbodygraphics blocks as well. I think I need these or the model doesnt have the parts to sit on. I could be wrong. That might be what was going on early last week with my baby going through the ground.