mac1,

I attach the picture showing exact axis' setting as is in the model. I made a small mistake in showing direction of BLUE axis of the component #3.

The point of my "tutorial" was to find a system of how to set axis of the component made of two other components, to make it cut at least one plane when placing on to the thick wall. When finishing the model, select all instances of the window component, explode them, and you will have windows with double-sided opening. And all this had been achieved without any punch-in openings which are hard to edit.

And the simple tip you might find useful:
If you are grouping walls for example, when making model, only way to make the cut-in component work (ex. #3 from my model) is to enter the group (walls) and then paste component (window) from the component browser. Putting components on groups doesn't work in terms of cutting-in. There are other ways to do it, depending on your work system (if you group/ make components or not).

see the model attached. I edited the picture myself in PS thick axis were to emphasize their setting.

double_sided_opening.skp

Hello everyone. I think I made another small step in resolving this double-sided cut-ins for window/door components. I might have missed the solution posted earlier, but here is my 5cents.

I get to the point where I nested #1 and #2 (external and internal openings) components inside the #3 which is a full window. What happened- I obviously lost 'cut opening' capability for all of them. But, when creating #3 component I set it's axis into those shown on enclosed image. Then I took it from component browser and dropped into the model. It lost 'cut-opening' feature only for the internal opening (#2). #1 still has it, and so #3. After exploding, #3 gets full cut-opening features. I hope you all understood what I meant, I think the picture shows it all. Only thing I don't understand is why component axis have to be different from model axis... any suggestions ?