Thanks for your help. I did exactly what you told me to do.
The hood I understand now, but I still wonder how de Velcro straps for the sleeves are supposed to work. See photo's: I could tie the sleeve around my wrist, but it didn't leave not one inch extra. And this is strange because have extremely small wrists. So the way to use the Velcro on the sleeves must be different, I suppose.
But apart of that I'm very happy with my Parcho! It is a very good design. And I also like my own adjustments: small zipper in front and sides open. And I will make a clip on the Parcho in the neck, to be clipped to the loop on top of my backpack, so I can carry the Parcho on my back, in case I expect rain, and want to have the Parcho directly close at hand.
@ d k
About the reason why: you mentioned it already. I wanted the airiness of a poncho, but with arms covered. Besides, this design of Bill Gurwell is much more sophisticated than an ordinary poncho, especially for the fit of the backpack, because in this design you create a kind of box (with rectangular forms) to put over the backpack. Thus you don't have a lot of unnecessary fabric hanging around you to have the same kind of coverage.
And you can make it custom made for the dimensions of each individual person and backpack.
The whole thing weighs 103 gram (3.6 ounces), with stuff sack 109 grams. I think the seam sealing or taping of the hood seams might add some weight.
Again, thanks for helping me.