diff --git a/monocle/src/main.cpp b/monocle/src/main.cpp
index 9e5fdc8..465ae3f 100644
--- a/monocle/src/main.cpp
+++ b/monocle/src/main.cpp
@@ -73,7 +73,7 @@ static mon::QAngle RandomAng(small_prng& rng, PITCH_YAW_TYPE type, bool has_roll
         case PYT_COUNT:
         default:
             p = y = 0.f;
-            MON_ASSERT(0);
+            MON_UNREACHABLE();
     }
     return {p, y, has_roll ? rng.next_float(-180.f, 180.f) : 0.f};
 }
diff --git a/monocle/src/vag_search.hpp b/monocle/src/vag_search.hpp
index 6b19063..09e0111 100644
--- a/monocle/src/vag_search.hpp
+++ b/monocle/src/vag_search.hpp
@@ -80,7 +80,7 @@ struct SearchPortal {
                 break;
             default:
                 lock_axis = -1;
-                MON_ASSERT(0);
+                MON_UNREACHABLE();
         }
         float lock_ax_val = rng.next_elem(lock_opts);
         const AABB& pos_space = rng.next_elem(pos_spaces);
diff --git a/monocle_lib/src/game/source_math.hpp b/monocle_lib/src/game/source_math.hpp
index a118b4d..e26c5aa 100644
--- a/monocle_lib/src/game/source_math.hpp
+++ b/monocle_lib/src/game/source_math.hpp
@@ -23,9 +23,9 @@ enum GameVersion : uint16_t {
     GV_9862575,
 };
 
-constexpr float PORTAL_HALF_WIDTH = 32.f;
-constexpr float PORTAL_HALF_HEIGHT = 54.f;
-constexpr float PORTAL_HOLE_DEPTH = 500.f;
+inline constexpr float PORTAL_HALF_WIDTH = 32.f;
+inline constexpr float PORTAL_HALF_HEIGHT = 54.f;
+inline constexpr float PORTAL_HOLE_DEPTH = 500.f;
 
 // sets FPU flags to what the game uses, setup before using any monocle code
 class MonocleFloatingPointScope {
@@ -139,6 +139,8 @@ struct Vector {
     }
 
     std::string ToString(std::string_view delim = ", ") const;
+
+    MON_VECTOR_CLASS_EXTRA;
 };
 
 struct QAngle {
@@ -160,6 +162,8 @@ struct QAngle {
     {
         return x == o.x && y == o.y && z == o.z;
     }
+
+	MON_QANGLE_CLASS_EXTRA;
 };
 
 struct matrix3x4_t {
@@ -184,6 +188,8 @@ struct matrix3x4_t {
     }
 
     std::string DebugToString() const;
+
+	MON_MATRIX3X4_CLASS_EXTRA;
 };
 
 struct VMatrix {
@@ -213,12 +219,13 @@ struct VMatrix {
         return m[i];
     }
 
-public:
     // replacements for operator*
     VMatrix Multiply(const VMatrix& vm, GameVersion gv) const;
     Vector Multiply(const Vector& v, GameVersion gv) const;
 
     std::string DebugToString() const;
+
+	MON_VMATRIX_CLASS_EXTRA;
 };
 
 struct VPlane {
@@ -239,15 +246,17 @@ struct VPlane {
     }
 
     std::string ToString() const;
+
+	MON_VPLANE_CLASS_EXTRA;
 };
 
 // g_DefaultViewVectors
-static constexpr Vector PLAYER_CROUCH_MINS{-16.f, -16.f, 0.f};
-static constexpr Vector PLAYER_CROUCH_MAXS{16.f, 16.f, 36.f};
-static constexpr Vector PLAYER_CROUCH_HALF = (PLAYER_CROUCH_MINS + PLAYER_CROUCH_MAXS) * .5f;
-static constexpr Vector PLAYER_STAND_MINS{-16.f, -16.f, 0.f};
-static constexpr Vector PLAYER_STAND_MAXS{16.f, 16.f, 72.f};
-static constexpr Vector PLAYER_STAND_HALF = (PLAYER_STAND_MINS + PLAYER_STAND_MAXS) * .5f;
+inline constexpr Vector PLAYER_CROUCH_MINS{-16.f, -16.f, 0.f};
+inline constexpr Vector PLAYER_CROUCH_MAXS{16.f, 16.f, 36.f};
+inline constexpr Vector PLAYER_CROUCH_HALF = (PLAYER_CROUCH_MINS + PLAYER_CROUCH_MAXS) * .5f;
+inline constexpr Vector PLAYER_STAND_MINS{-16.f, -16.f, 0.f};
+inline constexpr Vector PLAYER_STAND_MAXS{16.f, 16.f, 72.f};
+inline constexpr Vector PLAYER_STAND_HALF = (PLAYER_STAND_MINS + PLAYER_STAND_MAXS) * .5f;
 
 struct Entity {
 
@@ -267,7 +276,6 @@ struct Entity {
 
     bool is_player;
 
-public:
 #ifdef DEBUG_NAN_CTORS
     Entity() : is_player(true), player(Vector{}, true) {}
 #else
@@ -297,6 +305,8 @@ struct Entity {
     }
 
     std::string SetPosCmd() const;
+
+	MON_ENTITY_CLASS_EXTRA;
 };
 
 struct plane_bits {
@@ -329,6 +339,8 @@ struct Portal {
 
     std::string NewLocationCmd(std::string_view portal_name, bool escape_quotes = false) const;
     std::string DebugToString(std::string_view portal_name) const;
+
+	MON_PORTAL_CLASS_EXTRA;
 };
 
 /*
@@ -412,7 +424,7 @@ enum class PlacementOrder {
     COUNT = 2,
 };
 
-static std::array<const char*, (int)PlacementOrder::COUNT> PlacementOrderStrs{
+inline std::array<const char*, (int)PlacementOrder::COUNT> PlacementOrderStrs{
     "BLUE_UpdatePortalTransformationMatrix",
     "ORANGE_UpdatePortalTransformationMatrix",
 };
@@ -447,6 +459,8 @@ struct PortalPair {
 
     std::string NewLocationCmd(std::string_view delim = "\n", bool escape_quotes = false) const;
     std::string DebugToString() const;
+
+	MON_PORTAL_PAIR_CLASS_EXTRA;
 };
 
 enum PlaneSideResult {
diff --git a/monocle_lib/src/monocle_config.hpp b/monocle_lib/src/monocle_config.hpp
index b684fa6..f768dcc 100644
--- a/monocle_lib/src/monocle_config.hpp
+++ b/monocle_lib/src/monocle_config.hpp
@@ -1,11 +1,11 @@
 #pragma once
 
-#ifdef MON_CFG_INCLUDE
-#include MON_CFG_INCLUDE
+#ifdef MON_CFG_INCLUDE_EXTRA
+#include MON_CFG_INCLUDE_EXTRA
 #endif
 
 #define MON_LIB_VERSION_MAJOR 1
-#define MON_LIB_VERSION_MINOR 0
+#define MON_LIB_VERSION_MINOR 1
 
 #ifndef MON_F_FMT
 #define MON_F_FMT "{:.9g}"
@@ -36,3 +36,41 @@
     } while (0)
 #endif
 #endif
+
+/*
+* These will be inlined in the respective classes - can be used for implicit conversions to/from
+* your types. The easiest way to handle these is to create a custom header different from
+* MON_CFG_INCLUDE_EXTRA and include it before any monocle headers.
+*/
+
+#ifndef MON_VECTOR_CLASS_EXTRA
+#define MON_VECTOR_CLASS_EXTRA
+#endif
+
+#ifndef MON_QANGLE_CLASS_EXTRA
+#define MON_QANGLE_CLASS_EXTRA
+#endif
+
+#ifndef MON_MATRIX3X4_CLASS_EXTRA
+#define MON_MATRIX3X4_CLASS_EXTRA
+#endif
+
+#ifndef MON_VMATRIX_CLASS_EXTRA
+#define MON_VMATRIX_CLASS_EXTRA
+#endif
+
+#ifndef MON_VPLANE_CLASS_EXTRA
+#define MON_VPLANE_CLASS_EXTRA
+#endif
+
+#ifndef MON_ENTITY_CLASS_EXTRA
+#define MON_ENTITY_CLASS_EXTRA
+#endif
+
+#ifndef MON_PORTAL_CLASS_EXTRA
+#define MON_PORTAL_CLASS_EXTRA
+#endif
+
+#ifndef MON_PORTAL_PAIR_CLASS_EXTRA
+#define MON_PORTAL_PAIR_CLASS_EXTRA
+#endif