HI I have 2 simple tips that I have used and my help others.1 After cutting an edge on sheet metal and finding it not straight. I clamp it to a section of bar stock (angle will work too) and take a disc sander with heavy grit and sand it straight. Just cut it until you reach the edge of the bar stock and slide it along the edge. Unclamp and dress the edge.2 when I want to drill holes along a pipe or tube I lay it in a section of angle. Holding it in the "V" and mark the tube along the edge of the angle as long as you want. Any holes drilled along this line will be aligned with each other.have funTom Attached Images