I had to start by getting one piece in position and then start to mark of all the rest of the timbers. I had wanted to get more done but as it was dark i had to stop. It took a while to get the first main upright in position and ready to but once done it should make doing all the rest easy. With look now that the first corner is done it won't be long and the whole base should be done.
Well today i got a good start and now i need to go for more timber.