I am sort of back, but I have come up with new ideas. There are no "pure" gravitons in the space we are familiar with (I call it positive space). Take unbound charged particles: The electromagnetic field taps into null space to obtain additive spin value to reach spin value of 2. The spin is time element (I could give it any other name I suppose) and this allows the the spatial dimensions to seem perpendicular to each other in the context of the mass particle. Spin can be additive in other contexts such as 2 electrons being in same orbital...Pauli exclusion principle. In actuality the acceleration axis is the charge axis...it is linear ahead. The other 2 axes are the momentum axes and they lie curved behind the acceleration axis. Gravity has the appearance of acceleration in the sense that that it is curved behind the acceleration axis. The greater the combined mass, the greater the curve. Time, or configured spin additions, make the dimensions "seem" perpendicular to each other when in actuality they are not.
I am still working on these ideas in totum. Gravitons have charge and momentum (total inertia) constructs. Because of the 3 space aspects of this Universe, they may not "seem" to be massless. They can be massless in configurations though.