Reply To: Competition stones and modifying design angles for different R.I.s › Forums › Beginner Questions › Competition stones and modifying design angles for different R.I.s › Reply To: Competition stones and modifying design angles for different R.I.s June 21, 2016 at 8:03 pm #2703 michaelnoetzelParticipant @michaelnoetzel Uploaded this YouTube video; a Montage of still photos a day short video clips.