the copters can lift 5 tons and the booster was 1 ton which seems to me falling and gravity and all would be more likely guessing to be over 10 tons at least of acceleratred mass which not only have to lift but stop moving which is much harder since you'd have to have more than the moving mass of energy to slow it but not quickly since the copters or the rocket will break with to much breaking since the parts inside and the shell also will be pushing against each other and their mounts so it's a bunch of attached pieces each slowing against the place where the copters hooked the rocket.