IŽll post a picture of the spring. Is not really needed but my field is a bit bumpy and now all the bumps are perfectly absorbed. Try to mount all the equipmet as forward as possible or you will need to add nose weight. I donŽt have lead in the nose and my CG is a bit nose heavy with 3x 5000mAh batteries. Weight with 210N turbine, uat full + smoke system is around 12,5kg (27.7lb)