must feel great to get your code working, with interface. just got my first 'lua' method working in Ctrlr 8-) have you looked at axoloti? it has a modular interface like synthedit. you could copy demos from the synthedit demo and try them on the axoloti software, rebuilding them: always seemed to me like synthedit offered great flexibility because you approach it visually and just connect things rather than having to know how to code.
ie:try the Polysynth demo prefab, it has good crossmodulation of two oscillators, with pitch envelope and phase modulation, interesting routing.
the analog drum module prefabs are good too, in one of the other demos.