  In this work, we report a direct measurement of the forces exerted by a
tubulin/kinesin active nematic gel as well as its complete rheological
characterization, including the quantification of its shear viscosity, {\eta},
and its activity parameter, {\alpha}. For this, we develop a novel method that
allows us to rapidly photo-polymerize compliant elastic inclusions in the
continuously remodelling active system. Moreover, we quantitatively settle
long-standing theoretical predictions, such as a postulated relationship
encoding the intrinsic time scale of the active nematic in terms of {\eta} and
{\alpha}. In parallel, we infer a value for the nematic elasticity constant, K,
by combining our measurements with the theorized scaling of the active length
scale. On top of the microrheology capatilities, we demonstrate novel
strategies for defect encapsulation, quantification of defect mechanics, and
defect interactions, enabled by the versatility of the new microfabrication
strategy that allows to combine elastic motifs of different shape and stiffness
that are fabricated in-situ and on-time.
