diff --git a/src/diffcalc_api/__init__.py b/src/diffcalc_api/__init__.py
index f5f5d90..c8ba73b 100644
--- a/src/diffcalc_api/__init__.py
+++ b/src/diffcalc_api/__init__.py
@@ -1,6 +1,6 @@
 """API to expose diffcalc-core methods."""
 
-from . import config, core_types, database, openapi, server
+from . import config, database, openapi, server
 from ._version_git import __version__
 
-__all__ = ["__version__", "server", "config", "database", "core_types", "openapi"]
+__all__ = ["__version__", "server", "config", "database", "openapi"]
diff --git a/src/diffcalc_api/core_types.py b/src/diffcalc_api/core_types.py
deleted file mode 100644
index e01f190..0000000
--- a/src/diffcalc_api/core_types.py
+++ /dev/null
@@ -1,51 +0,0 @@
-"""Exposes types of diffcalc-core objects."""
-
-from dataclasses import dataclass
-from typing import Optional
-
-
-@dataclass
-class Position:
-    """Diffractometer angles in degrees.
-
-    Similar to diffcalc.hkl.geometry.Position
-    """
-
-    mu: float
-    delta: float
-    nu: float
-    eta: float
-    chi: float
-    phi: float
-
-
-@dataclass
-class Orientation:
-    """Reference orientation of the sample.
-
-    Similar to diffcalc.ub.reference.Orientation
-    """
-
-    h: float
-    k: float
-    l: float
-    x: float
-    y: float
-    z: float
-    pos: Position
-    tag: Optional[str]
-
-
-@dataclass
-class Reflection:
-    """Reference reflection of the sample.
-
-    Similar to diffcalc.ub.reference.Reflection
-    """
-
-    h: float
-    k: float
-    l: float
-    pos: Position
-    energy: float
-    tag: Optional[str]
diff --git a/src/diffcalc_api/models/response.py b/src/diffcalc_api/models/response.py
index 0c74ee1..d9a1c50 100644
--- a/src/diffcalc_api/models/response.py
+++ b/src/diffcalc_api/models/response.py
@@ -1,10 +1,16 @@
 """Pydantic models relating to all endpoint responses."""
-from typing import Dict, List
+from dataclasses import dataclass
+from typing import Dict, List, Optional
 
 from pydantic import BaseModel
 
-from diffcalc_api.core_types import Orientation, Reflection
-from diffcalc_api.models.ub import HklModel, MiscutModel, SphericalCoordinates, XyzModel
+from diffcalc_api.models.ub import (
+    HklModel,
+    MiscutModel,
+    PositionModel,
+    SphericalCoordinates,
+    XyzModel,
+)
 
 
 class InfoResponse(BaseModel):
@@ -83,6 +89,38 @@ class MiscutResponse(BaseModel):
     payload: MiscutModel
 
 
+@dataclass
+class Orientation:
+    """Reference orientation of the sample.
+
+    Similar to diffcalc.ub.reference.Orientation
+    """
+
+    h: float
+    k: float
+    l: float
+    x: float
+    y: float
+    z: float
+    pos: PositionModel
+    tag: Optional[str]
+
+
+@dataclass
+class Reflection:
+    """Reference reflection of the sample.
+
+    Similar to diffcalc.ub.reference.Reflection
+    """
+
+    h: float
+    k: float
+    l: float
+    pos: PositionModel
+    energy: float
+    tag: Optional[str]
+
+
 class ReflectionResponse(BaseModel):
     """Response for any operation returning a reflection."""
 
diff --git a/src/diffcalc_api/routes/ub.py b/src/diffcalc_api/routes/ub.py
index 6a3758a..07e69d3 100644
--- a/src/diffcalc_api/routes/ub.py
+++ b/src/diffcalc_api/routes/ub.py
@@ -4,7 +4,6 @@
 
 from fastapi import APIRouter, Body, Depends, Query
 
-from diffcalc_api.core_types import Orientation, Position, Reflection
 from diffcalc_api.errors.ub import (
     BothTagAndIdxProvidedError,
     InvalidSetLatticeParamsError,
@@ -15,8 +14,10 @@
     ArrayResponse,
     InfoResponse,
     MiscutResponse,
+    Orientation,
     OrientationResponse,
     ReciprocalSpaceResponse,
+    Reflection,
     ReflectionResponse,
     SphericalResponse,
     StringResponse,
@@ -100,7 +101,7 @@ async def get_reflection(
         ref.h,
         ref.k,
         ref.l,
-        Position(**ref.pos.asdict),
+        PositionModel(**ref.pos.asdict),
         ref.energy,
         ref.tag,
     )
@@ -246,7 +247,7 @@ async def get_orientation(
         orient.x,
         orient.y,
         orient.z,
-        Position(**orient.pos.asdict),
+        PositionModel(**orient.pos.asdict),
         orient.tag if orient.tag is not None else "",
     )
     return OrientationResponse(payload=orientation)