The most difficult part is  not the actual chiseling, but  to get the chiseled groove  to follow and enhance the  final result. 
The day the rune stone  is finished, it's these lines  that will bring movement  and life to the inscription  and ornamentation. 

Any chiseling error here  could cause the final result  to be lifeless. So I'm looking more at the  surrounding parts that will  later be painted, rather than  exactly where I'm chiseling.