Most builders advise starting with the vertical stabilizer because it seems to be the easiest part of the kit so that is what I am starting with and so far I believe they are right. I started by preparing the ribs per instructions and then putting the skeleton together and final drilling the VS-808PP, VS-410PP, VS-411PP and VS-412PP to VS-803PP to #30. Then the skin was clecoed on and final drilled to #40. All that needs to be done now is to take it all apart and deburr all the drilled holes and the skin, dimple, machine countersink and prime all the parts. ( I still haven't decided on my method of priming yet)