Thanks IanStephenson, thats really a good alternative for doing these chords on my B string, because those don't really sound as good as the higher chords. If I could just find a flatwound C- string somewhere...
That chordal aproach book seems interesting, is there an ISBN or something so I can order it?
I play thes chords bossa style (because I only played bossa yet with these chords). So I pluck the root with my thumb, followed by sorta popping the upper two strings, and with a little variation it sounds really nice (though probably out of tune, but thats my fretless' fault

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