A surgical system, comprising: a first stereotactic device (400, 402); a second stereotactic device; and a skull attachment device, comprising: a support base configured to seat against a skull of a patient, one or more pins extending from a bottom surface of the support base and configured to pierce the scalp to seat the skull attachment device against the skull, and an interface disposed along a top surface of the support base and having a shape that compliments a profile of a first mating feature (430, 460) of the first stereotactic device (400, 402) for defining a position and an orientation of the first stereotactic device (400, 402) with respect to the support base while the interface is engaged with the first mating feature (430, 460), wherein the top surface of the support base defines a plane comprising an origin of a stereotactic coordinate system while the skull attachment device (400, 402) is seated against the skull, wherein the second stereotactic device comprises a second mating feature with the profile of the first mating feature, and wherein each of the first stereotactic device (400, 402) and the second stereotactic device aligns with the interface of the skull attachment device at the same position of the stereotactic coordinate system defined by the skull attachment device. a first stereotactic device (400, 402); a second stereotactic device; and a skull attachment device, comprising: a support base configured to seat against a skull of a patient, one or more pins extending from a bottom surface of the support base and configured to pierce the scalp to seat the skull attachment device against the skull, and an interface disposed along a top surface of the support base and having a shape that compliments a profile of a first mating feature (430, 460) of the first stereotactic device (400, 402) for defining a position and an orientation of the first stereotactic device (400, 402) with respect to the support base while the interface is engaged with the first mating feature (430, 460), wherein the top surface of the support base defines a plane comprising an origin of a stereotactic coordinate system while the skull attachment device (400, 402) is seated against the skull, wherein the second stereotactic device comprises a second mating feature with the profile of the first mating feature, and wherein each of the first stereotactic device (400, 402) and the second stereotactic device aligns with the interface of the skull attachment device at the same position of the stereotactic coordinate system defined by the skull attachment device. a support base configured to seat against a skull of a patient, one or more pins extending from a bottom surface of the support base and configured to pierce the scalp to seat the skull attachment device against the skull, and an interface disposed along a top surface of the support base and having a shape that compliments a profile of a first mating feature (430, 460) of the first stereotactic device (400, 402) for defining a position and an orientation of the first stereotactic device (400, 402) with respect to the support base while the interface is engaged with the first mating feature (430, 460), wherein the top surface of the support base defines a plane comprising an origin of a stereotactic coordinate system while the skull attachment device (400, 402) is seated against the skull, wherein the second stereotactic device comprises a second mating feature with the profile of the first mating feature, and wherein each of the first stereotactic device (400, 402) and the second stereotactic device aligns with the interface of the skull attachment device at the same position of the stereotactic coordinate system defined by the skull attachment device.