A single plant is not a SCROG grow by definition. It's a single plant under a screen and unless you crop there is no point. You would do better growing it out as a cropped plant if height is an issue. Then again a 250w light will only give off good light for about 12-14". If you cropped it then you don't need to train it just tuck the fan leafs out of the way and you would get a better yield for your efforts.