I myself have tried a pull just to see what its all cracked up to be. It was with breaking in a new motor too. I was so like never again after that. Everytime I see someone yanking on that think in vidieos now I laugh Box or roto all the way for me. Nice thing about box is no more oneway bearings to worry about. Roto is good for those motors that are hard to get to the flywheels or just easier without a big box. No more lawnmower cords heh.