As you finish finding all the missing dimensions, you can begin using those lengths to transfer the blueprint to graph paper and identify the coordinates of the critical points around the base plate. Don't forget the screw holes!
It is probably better for each of you to create your own graph of the base plate rather than only making one per group. After all group members agree on what the graph should look like and what the correct coordinates are, you can collaborate on the final write-up. These milling instructions should contain a list of all the important coordinates around the base plate and a description of the curves involved. Each of these three arc lengths will need to be described by the center and the radius of the circle of which it is a part. Again, don't forget to describe the center and the radius of the screw hole! :).
Depending on the availability of computers and the program Geometer's Sketchpad, you might also plot the points of the base plate on the computer. If using Geometer's Sketchpad, you should bring up a new sketch and proceed as follows:
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