One of the things you need to work out early is what engine you are going to use. I went with the 4AGE 20V. For a QLD local it is looking like a bad idea, but I am still hopeful that it will make pass the DOT's requirements for emissions. I took pics of it to make sure that I could follow work out where things when putting the bits back together. Many other engines are better choices which will meet the requirements of emissions. This is a sore point for a lot of builders and causes the most pain.