Use an 17x6 APC in place of the 16x8 for improved thrust. This prop is sometime harder to find but the Satio 180 likes it alot. I would also recommend trying Coolpower 30% Heli mix for a boost in performance too. Make sure to get the heli formula because it has an increased oil content.

One thing I would like to add which has only been touched on once is that the key to making a cap 232 design more friendly is to use small rates on the elevator when flying and most of all KEEP THE PLANE LIGHT. Use only what is needed to fly the plane. No redundacy battery systems and forget smoke. I have seen an Lanier Cap 232 that was almost impossible to land due to its weight. It was 2 pounds overweight!!! He had to land it unbelieveably hot.