I got a question about two engines and i need some help. I was wondering what the differnce is between he OS .70 ultimate and the OS .70 surpass. what one would you buy. pros, cons etc. the reason im asking is because i have noticed alot of people recomending the .70 surpass and stuff but i look on the great planes website and it recomends the .70 ultamate and also on the OS website i was looking at the two engines and the Ultimate is smaller, has a full pump and just looks like a all around better engine. so i was just curios why people recomend the surpass and I havent read alought about the ultimate.