Bottle bosses (locating from either end of tube)

In BikeCAD version 15 a lot of flexibility was added to the placement of water bottle bosses including the placement of multiple bottles on any tube as well as the freedom to place them on the top, side or bottom of the tube. In version 17.5 the option to add single bosses was added. This is helpful for bolt-on frame bags. Since those bags are often located with respect to the front of the tube, now in version 20.0 we have a toggle button that allows builders to dimension bosses from either end of the tube.