Hi Emanuel,
this question raises its head regularly....
http://www.vikingsword.com/vb/showth...ighlight=gatka
http://www.vikingsword.com/vb/showth...ighlight=gatka
There seems to be 'two camps' .....those that agree about the techniques of Tulwar use ......and those that do not.
Personally I totally agree that the Tulwar 'became' an 'extension' of the arm /torso and sweeping cuts would be the norm. Wrist control is almost impossible so delicate movements would, similarly, be almost impossible.