Isnt that the truth.. When I worked at Caterpillar I was part of a special project. Everything about this piece of heavy equipment had to be as light as possible to make a certain weight. If memory serves right it was because they had to load it into aircraft. Anyways, every department had a representative there. Most of us noticed that the equipment had a lot of nuts and bolts hand tight at best.. When we brought that up in one of our meetings, the engineer was insistent that they could not be torqued, because when you torque a bolt it it gets heavier. We asked what he meant and he repeated himself. Arguing with us that he is right, and when the bolt and nut compress and it gains weight. You should been in that room... One of the higher powers that was also in this meeting was smart and dismissed him from the project. At least someone in that position had common sense.