Video - is a matter of chance.
If there is someone with a camera when I fly on the model.
If there is such an opportunity, I certainly share.
But the most pleasant option at the moment I can see only two engines - OS and RCGF-10cc.
Both engines are still new (warmer) and may have surprises.
But the most important thing in the engine - to function reliably in flight.
And I see in these two right approach to the specifics of gasoline engines.
Great weight of the model you have.
Try to see the potential weight savings.
For example very well give the economy the two servo -
http://www3.towerhobbies.com/cgi-bin...&I=LXEWSE&P=SM
http://www3.towerhobbies.com/cgi-bin...&I=LXEWSF&P=SM
They are very lightweight and powerful for its size.
And applying 2C LiPO 800 -1000mA you can significantly reduce the weight of the model.
And most importantly, they cost very good for its characteristics.