This is the device shot taken from youtube. I noticed there are several versions of the schematic, slightly different that were posted on several forums. I took the screenshot from the video uploaded by Chris and I will consider this one as the basis for my replication:
I also created a Circuit Wizard file. It's a habit of mine to run a simulation before trying anything for real, just to make sure nothing blows up. It would be useful if we would be able to upload files also. I'd like to share the .cwz file with you.