Have a look at the file "ronrighthand.avi" in the new folder "lute technique movies" at my lute repository at http://homepage.mac.com/dshoskes/FileSharing3.html.
It has Ronn McFarlane playing a scale (showing impeccable thumb under technique of course!) followed by a piece with chords (I think it was Dowlands Midnight). Note that his 4th finger positioning is very fluid depending upon the course he is playing and that sometimes it does come off the sound board after some chords. Of course, as a first rank professional player, he may be using a modification of technique not recommended for the beginner. I do try to keep my 4th finger anchored at all times and find that keeping it further from the first course and opening my hand and moving my arm at the elbow to get the lower courses gives me better tone.
