I just finished a 20M version of the 100A. It seems to work just fine except for low output (2 watts). The putting together part is really easy and straight forward until you get to the alignment part...... Spreading or compacting the turns on a toroidal transformer to get it on frequency seems a little wierd at first -- but -- it works. The little rig is hot as a pistol and has a nice sound in my GenCov receiver. I have not made a contact with it yet but it seems to be just fine.