Old post but here goes. I have converted a Mini Flash to a norvel .061. The plane was a bit tail heavy so I just threw the engine on to the front. It worked great but not enough power to hover it and it was hard to slow it down due the 061 fast idle speed. This winter I will strap an .074 on it.

MM makes great planes. I have the Mini Flash and had a Dandy Sport. Both are excellent flyers. One guy at the club had a Tantrum and he loved it.