@groovyruvy- I travel to rad places on a frequent basis and am going to figure out how to work SeaTac to make it happen. The other (and safest) alternative is to show up a few hours early and try to carry on. If TSA denies me then I'll take it home and come back in time to make my flight.
Curious, has anyone done this out of SeaTac and if so we're you given any trouble?
Doubt it'd make a difference either way but I will have it sitting in the form fitting Mafia sling pack