[werk_ag]

I took a look around our local electronics store yesterday, but they only had CB radio and 2.4 and 5Ghz antennas. I may need to look around ebay. The receiver unit to be connected to Cumulus and a server is about 4 meters and though a window to the Transmitting unit. So maybe a couple of lengths of wire cut to the wave length would work. The one for inside will have to have an antenna though, as it has to go through multiple walls and about 10 meters.

You're right. A 1/4 wave lenght, 0.5mm cooper wire will do a good whip antenna.
I did some testing with whip antennas and the results are even better than those obtained with these small helical antennas already manufactured.
The downside is just aesthetics. A SMA antenna looks better, when you want to put the electronics inside a box.

...(Fritzing looks good but missing components)...

Initially I thought of making schemes with Fritzing but encountered the same problem. And design new components did not seem easy to me.

Maybe I can help with that manual, from a newbies point of view. I'll try to document what I do, by I'm terrible with documentation, like most people

If you want to do that, I appreciate your help and it will be important.
As my English writing is not the best, I was thinking that maybe I could send you a pre-release of the assembly manual for a review of the written or improve some aspects which you think convenient. What do you think?
Writing documentation is also not one of the things I enjoy more...

I think I'll have the manual almost ready by the end of next week, or even before.

About the photo: Already playing with the DHT22
It's a nice sensor, and it supports wire lenghts to around 10 metters (manufacturer says 20), what makes it suitable for using as an outside Temp / Hum sensor. When installed inside a good Radiation Shield its accuracy is comparable to that of many mid-range Weather Stations.