Just as a starting point, I have found decent success with the following for 3/32" hobby balsa wood:
Score: 145/2, Cut: 245/50. The score goes partway through the wood, such that if I scored the artwork on both sides, I am worried it would cut all the way through. Might have to play around with that on the next version.
Made a model (with my son) of a North American B-25J Mitchell based on the SVG file found on the wikipedia page for the plane.