Well..I actually ran quite a few of them "back in the day", and owned one which I flew steadily for maybe 5 or 6 years before selling it in an airplane at a swap meet. It was just like my .46SF....only bigger. Like my other OS's, it was perfectly reliable, utterly consistent and one of the least worrisome components in the airplane...and when it comes to engines...that's a good thing!

The original poster wanted a recommendation for a motor? I say OS, and I say it for a good reason. Proven Product.