That Maths/Quadrax combo is no accident, either! They're fantastic modules to bounce off of each other. With the addition of the Qx expander, also, you then open up wild cascading envelope/LFO behavior...and you can use the various "End Of..." outputs to fire things back on the Maths, too. Or, hell, send the Maths on into audio frequency and then use it as some mutant VCO with the Quadrax doing the modulation. Loads of possibilities with those...