Hi Searles, thanks for this wonderful additional information (as usual from you!) I've not had time to properly digest this but a couple of thoughts arise with this:
1) Sall - Pole Star (a post or beam) - this would possibly relate to the Germanic Irminsul the post or beam around which the world spins. A brief precis' is here: http://en.wikipedia.org/wiki/Irminsul
2) Fuball - could this perhaps relate to Precession rather than whole Zodiac. I only ask becuase I was wondering if the Beltaine / Samhuin relate to particular Zodiac signs that rise at that time. Perhaps Orion (aka Frigga's Distaff) for Samhuin. Lugh's enclosure could relate to Sirius / Dog Star / Canis Major etc....
Most dear is fire to the sons of men,
most sweet the sight of the sun;
good is health if one can but keep it,
and to live a life without shame. (Havamal 68)http://gewessiman.blogspot.co.uk