If anyone is interested I just listed an OS 61SF pumper (ringed version) in the ads section. It's a very nice engine but I just don't have anything to put it in. I'm trying to thin out my rc stuff a little.

I have a a 61SF ABC pumper on my Midwest Super Hots and it's awesome. It has been very reliable, has great response and can hold the airplane on its prop.

If I only had enough rudder/elevator authority to keep it there.