In this joint work with Leigh Foster, we define and investigate a measure-preserving map from the 2-periodic single dimer model on the hexagon lattice to an instance of Kenyon's 1-periodic SL_2(C) double-dimer model on a coarser hexagon lattice. It is based on Young's squish map, defined in earlier work. This allows us to re-use existing computations of the 2-periodic single-dimer partition function (and, in principle, the correlation functions) in a portion of the parameter space of the the harder double-dimer model. The other direction of the map allows for some interesting conjectures in plane partition enumeration, when some of the generating function variables are specialized to roots of unity.