Hi Gene,
I am native born Czech, thanks for the compliment anyway ... :-)
Did you see the "fullsize" Helios already? If yes, do you have a photo or a link...? I have only made the drawings, but did not see the real thing yet..
We have a very good locally produced charger, the Tema "Power Cube", where you can set all the charging parameters manually... and the charging power is around 300 watts. Great product, never failed me during over 1000 cycles or so. When charging my F3A packs, I can go up to 7A into 10s lipo. Their site is here
http://www.volweb.cz/tema_sro/ but no info in English :-(
I will make more pictures when I see Jaroslav Mach, next week I hope.
David