The only tools you need are a drill, drill bit and a square. You can mark the boom using one of the button head bolts from the side of the frame of the heli by running it in and out of the threaded pinning holes a couple of times. Running the bolt in and out will mark the boom nicely for drilling. The square is to align the tail box, the other method is to look all the tail fin from behind and align it with the frame. You will have to do this regardless with or without the pins.
Rich