A torque wrench is nice, but once you get some corrosion inside the nipple it is not very accurate. I typically tune by ear, making a nice musical note. I think most people do this. Here is a modern version. I clamped my "snark" guitar tuner to the spokes. It is a simple $15 tuner that detects vibrations and displays the musical note. By loosening/tightening my spokes I can play any musical note. My spokes are the correct tightness at E. Cam
Not the worst idea I've seen . Given important (drag engine conrod) bolts get done up to a measured stretch as opposed to applying a turning force to the head I rekon it's pretty valid .
May be unusual, but if a guy was deaf, tone deaf, or like loud music while tuning spokes, it would work. Cam.