Rún Valdr also has a very good grounding symbol which skylark913 can attest to. I plan on using this a great deal for the group after the working is done. I'm also thinking of having available stones attuned to the grounding symbol that people can take when they leave the ritual.
Also my order of rowan wood from MagicalDruid has shipped! I basically just ordered the 9 sacred wood package but asked for only rowan wood. This will be used for the offering to Hlif, the Chieftain of Protection.