Im kidding a little. It's funny though that I have weed eaters and chain saws that are not top of the line but they have good compression.

I have numerous Chinese Engines that run well but have little compression when hand cranked. My two 3W Engines on the other hand really get your attention when you hand crank them. I'm sure they have much better tolerances and fit. I'm sure thats some of what the extra cost gets you.