I'm looking for input on the best way to make single segment curvature continuous datum curves that reference multi segment datum curves already created. Specifically if I have a datum curve with a line segment then an arc and I want to make a single segment curvature continuous curve that references and approximates this how do I do it? Approximate curves give undesireable curvature inflections at the line/arc intersection. Perhaps through points datum curves or ISDX would be a good solution. Any input?