In case you’re interested in seeing where Erling Skjalgsson lived, I’ve found a little film showing it. The stone cross is a replica of Erling’s memorial stone, and the church with the glass repairs is the old Sola church, built later than Erling’s time. But I’ve placed Ailill’s church in the same spot.
If I remember my history correctly, the guitar in this video has a sound authentic to the Viking age, what their flag bearers played in battle, if I’m not mistaken. Nice work.