creating assy from a broken up sketch

Draw the flatstock as a single part. Use your master sketch to drive a split feature (Insert>Features>Split). Then right click on the split feature and select Create Assembly.

That would work, but if you have any overlapping pieces that would be a problem. I would make a single sketch for all of my components, and then extrude using the "Selected Contours" method (see help under contour selection). Let me know if you need more help.

HTH, Muggs

Have a look at What's New for 06. There are some tools using sketch blocks that do this.

How about this?

1. In a new assembly, create an assembly sketch as your master sketch.
2. Insert however many parts you need. Make sure you mate all of the parts to the origin of the assembly.
3. Edit each part and derive the master sketch from the assembly to each part. The sketches will be shown NOT fully defined. There are no problems with this as long as you mated all of the parts to the origin as stated before.
4. Now open each part and use the derived sketch to convert geometry from, and control features.
5. As long as you are just changing the master sketch geometry by resizing and such, everything will update just fine, remarkably fast. If you were to change the master sketch by adding or subtracting sketch geometry, there may be some errors to clean-up in some of the parts. But they are usually quick and easy to fix.

I use this method almost exclusively in mold design for splitting up inserts. However, I create at least 3 sketches (one on each orthogonal view), and derive all 3 of these into each part, on the appropriate plane. I use all of these derived sketches to reference from instead of anything in-context in the assembly. The great thing about this method over actually converting geometry from the master sketch in-context is speed. For some reason, derived sketches take WAY less time than in-context sketch relations or feature relations. It is actually very fast.

How often do you run into problems withe the derive getting broken or not updating correctly? I've been avoiding derived sketches in-context for a long time, and I'm wondering how they are, currently.

The derived sketch itself (in the part) never breaks... However any sketches/features in the part below the derived sketch that refers to it, could potentially break if changes are made to the master sketch such as deleted sketch geometry and such. Usually this are fairly quick and easy to fix unless the sketch geometry completely changes (i.e. delete all sketch geometry and redraw). Repairs in these cases can take a bit of time. You just have to develop habits on how you create your master sketches to minimize this potential. You tend to figure this out after a while. Actually, I don't have things break very much anymore now that I have figured out some of these techniques. Things usually just update, and update fast I might add.