We present an overview of the 6 unifying features of a toy model of quantum gravity developed over at least 7 papers : the SQT-model. SQT stands for Scale-invariant Quantum Theory, a theory under development. This work is a concise summary of the main features. A way to model gravity with discrete ‘quanta’, from a causal principle (action of mass & reaction of field) evolved into several features with a specific relevance for different scales of size : a scale-invariant model. The result is a multi-functional quantum of the field at the epicenter of unification in the SQT-model : Unit of length of space ~ unit of momentum transfer for the propagation of light ~ unit of wavelength ~ unit of energy hence local field energy density. In fact, the known relativistic effects already show that the elements above are intricately intertwined through Gamma : length contraction, time dilatation, relativistic E-absorption, frequency of light. Within the model we show a.o. how General Relativity can be generalized, and how the model reduces to Newtonian physics.