G'day from Australia, I have been watching a lot of videos from Canada with jumps, table tops and more made from fallen logs in the forest. I would like to do the same on the local trails here in Australia, but I cant find anything to tell me how the main structure fits together. How do the logs join, how do you get top rails to sit on uprights. I know you use a lot of nails for the running boards, but the uprights I need help with. Can anyone help with info, pictures or videos, any advice would be greatly appreciated.