http://www.youtube.com/watch?v=MH94dw-YK6Y
http://www.youtube.com/watch?v=-ISoQs8W8Rcd
In first movie, starting at 1:01 to 1:17 it can be seen the channel of the tonga being slightly oriented upward, not perpendicular to bows plane.
Next, when the arrow is released, the tonga make a rotation counter-clockwise until the channel is oriented up, in paralel plane with the bow.
The rear part of dart is going upward, that because of high nocking point in korean technique and this tonga rotation and vertical oscilation of the dart can be seen in the second movie starting to 3:08 from 3:14.
I guess that korean tonga is made with the chanel slightly oriented to upside and this pic should confirm this suposition:

This option would be choose to avoid friction between the rear part of dart and the superior edge of the channel when the nock is going up, this movement can damage or break the arrow (producing vibrations?), if the chanel is made at 90 degrees from bow plane.
Now, I wonder if it possible to use korean technique (high nocking point and low gripping) and shooting a majra. I thing it can be dangerous shooting a majra when the nock is starting to going up, the point can go down and hit the bow hand.
Or it will be wise to nock lower an griping the bow using turkish or arab technique, by pushing with the flesh between index and thumb?
