diff --git a/app/Http/Requests/SystemRegisterRequest.php b/app/Http/Requests/SystemRegisterRequest.php
index aa77743..50081e8 100644
--- a/app/Http/Requests/SystemRegisterRequest.php
+++ b/app/Http/Requests/SystemRegisterRequest.php
@@ -23,7 +23,12 @@ class SystemRegisterRequest extends FormRequest
 
 		// @todo Also disallow claiming this hosts system
 
-		return Gate::allows($this->route('o')->users->count() ? 'update_nn' : 'register',$this->route('o'));
+		return Gate::allows(
+			$this->route('o')->users->count()
+				? 'update_nn'
+				: 'register',
+			$this->route('o')
+		);
 	}
 
 	public function messages(): array
@@ -31,6 +36,7 @@ class SystemRegisterRequest extends FormRequest
 		return [
 			'hold' => 'Must be Yes or No',
 			'pollmode' => 'Must be Hold, Normal or Crash',
+			'pkt_msgs' => 'Sorry, only an admin can increase this above 100',
 		];
 	}
 
@@ -39,7 +45,7 @@ class SystemRegisterRequest extends FormRequest
 	 *
 	 * If the system exists (POST & action="register" & system_id=<value>), then no validation required
 	 * If the system doesnt exist (POST & action="register" & system_id undefined) then we need just a name to start the process (action="create")
-	 *	Then, full validation
+	 * Then, full validation
 	 * @return array
 	 */
 	public function rules(Request $request)
@@ -70,7 +76,16 @@ class SystemRegisterRequest extends FormRequest
 			'hold' => 'sometimes|boolean',
 			'pollmode' => 'required|integer|min:0|max:2',
 			'heartbeat' => 'nullable|integer|min:0|max:48',
-			'pkt_msgs' => 'nullable|integer|min:5',
+			'pkt_msgs' => [
+				'nullable',
+				function ($attribute,$value,$fail) {
+					if (($value > 100) && (! Gate::allows('admin')))
+						$fail(true);
+				},
+				'integer',
+				'min:5',
+				'max:65535',
+			],
 		] : []));
 	}
 }
\ No newline at end of file