I have a built 2004 rxp engine that is running on the limiter and runs great with factory tune. I have heard that the older skis can be a bit tricky to get tuned right. And I have no trust in a maptuner x tune as I have seen them smoke several gp1800s on a stage 1 tune. What are my options to make a tune that is identical to the factory tune but does not limit my rpm to 8150? thanks in advance.