I've switched over to using KiCad, which is a much faster and more feature rich schematic editor, and it's taken a little while to get used to the new workflow. Once I got the simulation working in KiCad, it took a day or so to update CCS (Cytomic Circuit Solver) to parse the slightly different syntax KiCad uses for the .subckt command, but once I exported the netlist it simulated the full compressor first try. This is the largest ever circuit I've simulated in realtime, and it worked first time! The system of equations has 130 unknowns (voltages and currents), and so the matrix is 130x130 in size and looks like this:
