MasterKamera, during my few rigging attempts (I attempt to model in 1/72nd) I used either very thin Dai-Rikki (sp?) fly leader or dark grey "invisible" sewing thread. I use the method as outline by our wonderful Polish modeller here, Prze, where in you drill a blind hole, glue it in with CA, and pull it tight through the other, secure with CA, cut off, then paint/decal over.
WD