QMU Gravitational Field Theory II: Closure Coupling, Ledger Closure Constants, and Strong-Field Structure

QMU Gravitational Field Theory II derives the closure constants left unresolved in the first-order scalar formulation of QMU gravitation. The paper shows that the propagation-potential projection coefficient, closure-to-mass projection coefficient, and closure-density coupling are fixed by Ledger One, the propagation-force ledger, and Newtonian recovery: \[Γ_c = A_u\,curl = c^2,\] \[η_m = {c^2}{Gforce} = G/c^2,\] \[κ_c = 4π.\] These identities close the Newtonian projection condition, \[Γ_c κ_c η_m = 4π G,\] and yield the gravitational ledger identity \[G = {(A_u\,curl)^2}{Gforce} = {c^4}{Gforce}.\] The paper treats the propagation-force ledger, \[Gforce = m_a λ_C {F_q}^2,\] as the primitive gravitational quantity for the scalar closure sector. In this restricted gravitational ledger, both Newton's gravitational constant and the Aether maximum mass are derived quantities. The work also clarifies the finite-source interpretation of mass in the Aether Physics Model. Instead of treating matter as a mathematical point source, the fundamental source is identified as a finite closure-density distribution associated with the ligamen circulatus. The point-mass solution is retained only as the exterior projection limit. This preserves the Newtonian inverse-square field, Schwarzschild radius, and first-order light-deflection result while avoiding a central singularity in the physical source model. The scalar gravitational wave is interpreted as a propagating perturbation of the closure potential, and RMFD detector coupling is framed as a calibrated rotational closure-response channel. The paper closes the scalar gravitational ledger while reserving full rotational closure, stress-energy analogs, post-Newtonian expansion, and compact-object interior solutions for the next stage of the theory.