RE: I need an engine for a showtime 4D!
I am using a GK Satio 150 on mine. I put the rudder sevo in the tail and the balance worked out almost perfect without having to add any weight to it what so ever. The motor fits in the cowl nicely. Its not over powered as bad as you think it would be either. But the satio 150 cost a little more that the OS120 to. Just my thoughts. hw123