Can anyone point me to an article, post or website that details how to build a cowl from scratch?

I am doing so on a Sig Four Star 60, it has an inverted mount Saito 91 in the nose. I have seen sites that show pictures of their cowled Four Stars -- but I sure could use some ideas on how to proceed...

It really doesn't matter if the cowl was for a Four Star - just that it was built up from wood (balsa).

Anyone have anything?