RE: zen 30
Lovinero,
The OS 46 FX is most likely over kill but I am sure the frame will handle the added power. If proped correctly you will have a rocket ship. I used a four stroke and had no difficulty with speed or power. You will find that the ZEN 30 will fly just like the ZEN 90.
I have never had a bad flying plane from World Models.
Flashingredd