I't been a while since I have been on here, and even longer since I have worked on my old ring design. After much cogitating, I think I can do the following: but am not sure where to start.

1. Create 10 datum planes attached at the same edge (think leaves of a book)

2. Place slightly different sketches on each of the datum planes, all of which have a length contraint from the common edge, such that I can hopefully change just 1 dimension and have all the different sketches on the dataum planes, move.

So to conceptualize this, say the 10 datum planes are attached by their right hand edge. I create a small flattened oval on dataum plane 0, and set a distance constraint from the bottom of that oval to the right hand edge. I then create a slightly wider oval of the same thickness on dataum plane 1, and set the same constraint on it. I repeat this for all 10 datum planes.

I think link these constraints with an equality so that if I change the length constraint number, all 10 sketches will move.

Then I can set the planes for various angles, set a length constraing, and do an additive pipe to make a 180 degree segment of a ring.

SOOOO

1. How do I create 10 dataum planes, all connected at one edge, and all n the same plane.

2. How do I put a sketch onto one plane?

3. How do I copy that sketch to the next plane, and set a length constraint from the common edge.

4, How can I alter the second sketch without affecting the firs sketch, but being able to see the the first sketch so I can used it as a construction guide for the second sketch and so forth.

Watched a couple of you tube tutorials, but still does not make a lot of sense.