In my opinion, I think that you should build a few easier designs before taking on this project.

Build a trainer. Make it straight and flyable. Then build a GP Sportster, or Sig 4 Star. Then, maybe a Sig 1/4 Cub. This will give you the experience needed to attempt a Ziroli design, without the aid of instructions.

You have to learn how to build straight and true, before attempting more advanced building procedures. You should develop a knowledge of how and why certain procedures are done.

We are all in a constant stage of learning. Nobody knows everything. We have to learn how to walk, before we can run.

It will be to your best interest to take your time, and achieve the skill necessary to build a Ziroli Stearman.