I use a cheap fleabay luggage scale as well. I will try to attach a pic of the one I have. I can scale a bow by myself. I attach the strap around the bowstring. I have an arrow with inches marked and a tight fitting fender washer "stop" that I can slide to the draw length I want to measure. Pull it back to the washer stop and after a few seconds of holding steady the scale will beep and record the weight. Seems to be unbelievably accurate and weighs to decimal points (tenths of a pound).