this is the result of my bachelor degree work. i find that avoiding emotional drama scenes is very important for me. this is maximum effective operation, but requires long term recovery about month. if you want convenience at an affordable rate, then you are in the right place. the direction of the force on the first object is opposite to the direction of the force on the second object. i don’t think i could just guess at what you did to put this together and get it right. now, this really is the icing on the cake. 