I'm thinking that Lee means the older OS .35-S or MAX-S. It's the same case as the OS.30 he's mentioned also. I don't know if they are the same mounts as the later OS.35 FP-S. If so, it should run well with the smaller venturi like Brett mentions, and start with a 10-4 prop. The model looks like another design based on the venerable Twister wing. I have built bashed Twisters with sheeted leading edges and cap stripped ribs. I usually cut all the ribs the same as the center section sheeting for this purpose. The wing on my Dusty stunt, profile scale model is built this way with one rib bay added on each wing. We tried using the outer rib and sheeted/cap stripped that wing on one of Sean's Twister/Akromater bashed models when he was a junior. They all flew well, and carried extra weight well, and were very stiff and strong. Watch the balsa weight and not too heavy either.
Type at you later,
Dan McEntee