Sorry checkerron, I just changed my handle,
Your answer was helpful, but my question was because I am welding a tube to a purchased valve that has a 6 studs pattern, so I want to use the pattern as datum to assure the tube is perpendicular and in the position I need it to assmble. The parts have...
How would you use a hole pattern as a datum in an assembly, when this pattern comes from a purchased part? Is it really neccesary to have a feature control frame in the hole pattern?
