If you want to get anything done in the engine "room" of a Southern Cross 31 you have to be a contortionist. It's torture. Installing a hatch in the cockpit deck might help a lot. Some very old posts mention in passing a "Freeman 2400 oval hatch" for this purpose. Do you have any additional information? The Freeman 2431-0002 "12x18", or their 2433-0002 "15x24" model? The larger model seems too big - it might interfere with the exhaust elbow and/or muffler. True?