InstancedMesh count

As I understand, if I create an InstancedMesh with, say, count 4 in the constructor, I can then set it to 3 at the runtime. Can I then increase it back to 4 or do I need a new mesh?

The docs mention “original count value” as the limit but I don’t see any property on the mesh that would store it, only the current count.

Do I need to store the original value myself?

Yes. And yes, you can increase the count value back to 4.