Hello and Welcome to our addiction. A word of warning: There is no 12 step program for this one! Many good folk here with a load of experience that they are more than willing to share. If you have specific questions just start a thread and someone with experience will be along soon to offer advice. All info you can provide us with such as smoker type, location and so on will help us answer any questions you may have. Spend some time doing some research on the forums, tons of advice and recipes already available there. We look forward to your contributions.
Just as a side note: how are you planning to control the warping when you cut the door and from the heat when in use? Without a counter weight I am grasping here. That will be a pretty heavy door especially when you consider the angle of the lift ( and I think you will add weight to control warping ). 2 broom handles cut to the EXACT length. Anything "spring loaded" MAY lose the spring because of the heat. What about the hinges for the hood of a car and a latch to hold it down? Still may have a problem with the heat/spring thing. Hopefully someone else has better ideas. Keep Smokin!