In short, Principal Force (PF) is the fabric or web of "everything" and it acts on a level that is so small that we can only observe the effects of it in the current state of Physics science. Quantum Particles (QP) are effects of PF doing interactions with itself and possibly other waves and radiation and is the closest current level we may observe the Principal Force on.
For example: If a sensor tries to detect a PF wave bit, the QP building blocks in the sensor "stuff" may be affected and make minute change to the building blocks themselves or more likely the PF waves themselves will simply pass through the sensor. We may however detect the effects from interactions, and according to the thesis this is likely what happens when we observe spin, level shifts and other Quantum Particle/Physics behaviour.
One observation that is of interest is the difficulty measuring "gravity" on the smallest levels. It's perceived weak and of little impact. If one instead split the perception of what PF does with QP and (sub-)atomic particles into the QP behaviour of the mentioned and also the observed "gravity" forces measured it may make sense that atoms and sub-atomic stuff proves difficult to weigh.
* In one instance the weight observed may be higher because the PF effect causing acceleration style behaviour has a high impact
* In the next instance the weight observed may be less because the PF effect causing acceleration style behaviour has a low impact
This leads to the likely conclusion that a quantum particles with a set of properties will have a different "weight" than the "same" quantum particle with different properties. Indeed, different properties may cause the same wave interaction event with a property altered by PF to be perceived as different particles, while they from a basis viewpoint are the "same".
Keep in mind also, that in the mind of the author there's no mass. Mass is PF (and other waves) interactions causing acceleration style properties.