w just said. ;-) Are you saying
that it's easy to get multiple objects living in the same space? ...or
something more sinister?

Something else to play with. Often you need mirror images of a component,
some times mirror images of the mirror images. Copy the component, scale
it with a factor of "-1" and you get a mirror image without having to copy
and rotate. Now if you edit the original all mirrored copies update as a
mirror image also.

Foe example drawer sides. Draw one and copy then scale the opposite side.
If you add a groove for a bottom
or rabbet on the end the scale copy gets the changes where you want them
also.

Ok, but can you scale with a factor of -1 in one dimension only? If
your groove doesn't go through, does it get it end up still in the
"back", say. IOW, if your drawer slide stops 2" short of the drawer
front, does the groove now stop 2" short of the drawer back, on the
top instead of the bottom (after flipping)?

Select the component and then click in the scale icon. You will see small
cubes form around the edges and corners and middle ff the sides. Grab the
cube in the middle of a side and drag it towards the center to indicate the
direction that you want to reverse the component. Then enter "-1". Now
everything changed on that component will show up as a mirror image on the
other component, either one.

If your drawer side grove stops 2" short of the back the scaled component
side will also have that grove stopped 2" Short. You literally get a mirror
copy.

You can scale in any direction, you can do the same for the front and back
of the drawer. It all depends on which cube you grab/ click on and drag.
Experiment with it. I never draw opposite sided components, I copy and
scale. Now if you need to add a little extra to the scaled copy or the
original, right click, make unique, and make your modifications. The
mirroring will not continue from that point.