  We study enhanced magneto-association of atoms into weakly-bound molecules
near a Feshbach resonance using a quench preparatory stage. In anticipation of
experiments with NASA's Cold Atom Laboratory aboard the International Space
Station, we assume as a baseline a dual-species ($^{87}$Rb and $^{41}$K) gas in
a parameter regime enabled by a microgravity environment. This includes
subnanokelvin temperatures and dual-species gases at densities as low as
10$^8$/cm$^3$. Our studies indicate that, in such a regime, traditional
magneto-association schemes are inefficient due to the weak coupling between
atomic and molecular states at low-densities, thus requiring extremely long
magnetic field sweeps. To address this issue we propose a modified scheme where
atoms are quenched to unitarity before proceeding with magneto-association.
This substantially improves molecular formation, allowing for up to $80\%$
efficiency, and within time-scales much shorter than those associated to atomic
and molecular losses. We show that this scheme also applies at higher
densities, therefore proving to be of interest to ground-based experiments as
well.
