If you don't buy any other tools... This is a MUST have.
I originally bought the pneumatic squeezer at the beginning of the build. As I used it... it became the tool of choice for any squeezing... the ease of use and the quality of the finished rivet is great.
What I added today was... the longeron set (Mounted on the Tool) and the 4" thin nose set on the right of photo. The standard 3" set picture on the left came originally with the squeezer.