Hi Mitch,
I have 6+ years flying but am always learning(every time out!!)
I just received a partially built F4 Ducted Fan made from Ziroli plans.
I also have the plans.(may not be complete)
The plans are now available at Kress Jets in Ney York. 845-336-8149
I will be calling them for more info. This may not be a good first
ducted fan. The F4 used to be my alarm clock when I was in the Air Force.
Maybe that's why I would like to finish building it and hopefully get it into the air!
I have not scratch-built a plane either.
This info may not help you out but may give you another resource.

**Anyone out there familiar with the Ziroli F4: ~35" wingspan??**

Good Luck!
Mike