I don't care about price. I'll fly what is best for any particular application. With that being said, I'll never fly a 4-Stroke on a .40 sized profile for a couple of reasons.

The first and biggest reason is one that's already been brought up, throttle response. I've seen a lot of 4-stroke profiles fly and every time the pilot is having to constantly work the throttle up and down to try and maintain a steady hover/torque roll, usually to no avail. It wears me out just WATCHING!

There's just no way that an engine firing on every other revolution can ever have the throttle response of an engine that fires on every revolution. Add the extra weight and drag of the larger 4-stroke propeller and the spool up/down response time is much greater. What has better throttle response, your 2-stroke weedeater or your 4-stroke lawnmower?

The other reason is weight. I've talked to many a 4-stroke enthusiast about this and the first thing they tell you is the Saito only weighs a couple ounces more. What they don't take into consideration is the weight of the whole power package and including the prop the package weighs several ounces more. Weight is critical......

Most people are used to 4 lb plus airplanes and have never flown a 3.5 lb airplane. Fly a 3.5 lb airplane with a 2-stroke engine for a few flights, then try and go back to that 4.5 lb 4-stroke lead balloon you've been flying. You'll put it up for sale so fast, your head'll spin.[&o]

........yeah, yeah.........your's flys great........I'm serious, fly a 3.5 lb plane and your opinion will change dramatically!

Rob