Rather than scan in a three page article, the pertinent points in this seem to be - his early influences, Woody Guthrie and Johnny Moynihan, his chosen type of instrument / maker - Stefan Sobell.
The more lyrical approach to his playing comes from not attacking a mandolin like a banjo, and the idea of playing almost exclusively in GDad tuning. This tuning "was motivated by listening to a lot of Old Timey music and from Appalachian fiddle tunes. - also liked the open top D string because it had resonances of the 5 string banjo."
From Simon Mayor "New Celtic Mandolin" - Andy Irvine Interview, pgs 49-51
Mandola fever is permanent.