I asked about if the OS FL-70 is great choice for a 46 UCD and they told me to install an even bigger engine, while the manual only reccomends for the 46 4-stroke engines in the range of 51-70 (something like that). That's why i chosen a 70, because is the biggest i can install. With a bigger engine, i think it will be hurt to do aerobatics. What about that?