[Koha] MARC modification templates w/ indicators?

Do MARC modification templates support changes based on, or to, MARC indicators? For instance, I'd like to change all instances of 856 _8 to 956 _ _. However, I don't see a clear way to specify or insert indicators w/ or w/o RegEx. Are the indicators considered part of the field data? I could do this with MarcEdit, but I'd rather just do it here. Is MarcEdit the only option? Thanks!! Tasha Bales Enterprise Services http://isesi.web.boeing.com/