Well,

As promised, I posted comparison video: http://www.webmasterphoto.com/geebee

Bottom line: The OS 52 powered version flies great. We were in OKC which is at 1200 feet above sea level. It was swinging an 12x8 master airscrew. The OS 70 was swinging an APC 13x8. In the video the power settings between 50 and 75% and while the potential for good vertical exists the plane is so small that we did not want to get them that far away.

It was also pretty windy as can be heard in the audio 8 MPH with Gusts up to 12 MPH were pretty standard. We did not get video but we had both in the air at the same time and it was a site to behold.

We took the wheel pants off as well since the runway that we cut to fly from was pretty rough and the replacement cost is $80 a set.

Enjoy