I can make a stamp with the outer wall, but I’m unable to make a cutter that will align perfectly with the imprint created by the stamp.
The cutter always ends up being slightly too big when using the same dimensions.
Is it possible for the cutter to trace the inside of the outer line rather than the outside?
Here is one way you can do it. There seems to be a little quirk in the system where it is using the stamp gap / tolerance even when making just the stamp. So the first thing you can do is choose cutter + stamp and set the stamp tolerance to zero:
Then switch back to stamp. The stamp will now be the exact same size as the inside of the cutting blade. (Previously it was smaller than that, by the tolerance) so this gets you closer. To overlap a little more you can increase the stamp size or decrease the cutter size a little.