I have been playing with the 5Combs contraption lately - one of the few contraptions I have never really used in Audiomulch. I see now that I should have :-)
One feature I think would enhance this contraption is a master frequency slider, similar to the one on 10Harmonics. This would allow changing the base frequency while retaining the ratios between the other resonators. Since this would be somehow tricky to implement on the same UI, perhaps a separate contraption could be used for this that allows only a base freq and ratios for the other four resonators.