diff --git a/Include/Aurora/Debug/SysAssertions.hpp b/Include/Aurora/Debug/SysAssertions.hpp
index 6c282011..acd2e327 100644
--- a/Include/Aurora/Debug/SysAssertions.hpp
+++ b/Include/Aurora/Debug/SysAssertions.hpp
@@ -18,6 +18,15 @@
     #endif
 #endif
 
+// AU_NO_INC_ARG_EXPRESSIONS / AU_INC_ARG_EXPRESSIONS is seemingly what the SysCheck's were looking for.
+#if defined(AU_NO_INC_ARG_EXPRESSIONS) && !defined(AURORA_ASSERTIONS_NO_EXPRESSIONS)
+    #define AURORA_ASSERTIONS_NO_EXPRESSIONS
+#endif
+
+#if defined(AU_INC_ARG_EXPRESSIONS) && !defined(AURORA_ASSERTIONS_FORCE_EXPRESSIONS) && !defined(AURORA_ASSERTIONS_NO_EXPRESSIONS)
+    #define AURORA_ASSERTIONS_FORCE_EXPRESSIONS
+#endif
+
 #if defined(AURORA_ASSERTIONS_NO_EXPRESSIONS)
     #define _AUKCON_STRINGIFY_X2(...) 
 #else 
diff --git a/Include/Aurora/Debug/SysErrors.hpp b/Include/Aurora/Debug/SysErrors.hpp
index da74f9c2..24066b85 100644
--- a/Include/Aurora/Debug/SysErrors.hpp
+++ b/Include/Aurora/Debug/SysErrors.hpp
@@ -182,7 +182,7 @@ namespace Aurora::Debug
     #define SysCheckNotNullMemory(x, ...)        if (!(static_cast<bool>(x))) { SysPushErrorMemory(); return __VA_ARGS__; }
 #endif
 
-#if defined(AU_CFG_ID_INTERNAL) || defined(AU_CFG_ID_DEBUG) || defined(AU_INC_ARG_NAMES)
+#if (defined(AU_CFG_ID_INTERNAL) || defined(AU_CFG_ID_DEBUG) || defined(AU_INC_ARG_EXPRESSIONS)) && !defined(AU_NO_INC_ARG_EXPRESSIONS)
     #define SysCheckRetExpNotNull(x, ...)        if (auto n = x) { return n; } else { SysPushErrorGeneric(#x " must not be null [return]"); return __VA_ARGS__; }
     #define SysCheckRetExpNotNullMemory(x, ...)  if (auto n = x) { return n; } else { SysPushErrorMemory(#x); return __VA_ARGS__; }
 #else
@@ -190,6 +190,9 @@ namespace Aurora::Debug
     #define SysCheckRetExpNotNullMemory(x, ...)  if (auto n = x) { return n; } else { SysPushErrorMemory(); return __VA_ARGS__; } 
 #endif
 
+#define SysCheckNotNullNested(x, ...)        if (!(static_cast<bool>(x)))       { SysPushErrorNested(); return __VA_ARGS__; }
+#define SysCheckRetExpNotNullNested(x, ...)  if (auto n = x) { return n; } else { SysPushErrorNested(); return __VA_ARGS__; }
+
 // edge case
 #define SysPushErrorNested(...)           Aurora::Debug::ErrorMakeNested(__VA_ARGS__);