M_Boats: M17 backstay

Hi gang, I am having a time getting the backstay wire diameter on my M17 '04 model; my dial calipers say just over 1/8, but not definitively 5/32? (actually the reading is about 9/64). Anybody have the true figure? The thread size on the swaging appears to be 1/4". Thanks, Tom Jenkins M17 Scintilla